CN112630671A - Lithium battery performance test system - Google Patents

Lithium battery performance test system Download PDF

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Publication number
CN112630671A
CN112630671A CN202011563315.9A CN202011563315A CN112630671A CN 112630671 A CN112630671 A CN 112630671A CN 202011563315 A CN202011563315 A CN 202011563315A CN 112630671 A CN112630671 A CN 112630671A
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China
Prior art keywords
test
battery
thickness measuring
bracket
meter pen
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Pending
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CN202011563315.9A
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Chinese (zh)
Inventor
马可人
尹航
李城剑
李玉
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Lishen Qingdao New Energy Co Ltd
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Lishen Power Battery System Co Ltd
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Priority to CN202011563315.9A priority Critical patent/CN112630671A/en
Publication of CN112630671A publication Critical patent/CN112630671A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385Arrangements for measuring battery or accumulator variables
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/02Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/378Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389Measuring internal impedance, internal conductance or related variables
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285Testing apparatus
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a lithium battery performance test system which comprises a test bottom plate, a test probe and a thickness measuring bracket, wherein the test bottom plate is provided with a test probe hole; the front end of the top of the testing bottom plate is provided with a thickness measuring bracket; the top of the thickness measuring bracket is provided with a laser thickness measuring sensor; the right end of the top of the test bottom plate is provided with a test probe bracket; the front end and the rear end of the test probe support are respectively provided with a test meter pen which is a positive test meter pen and a negative test meter pen; the left ends of the two test meter pens are respectively used for contacting with a positive pole and a negative pole of the battery; the right ends of the two test meter pens are connected with the detection end of the open-circuit voltage and battery internal resistance test equipment; two test probes are arranged on the left side of the test probe bracket; the left ends of the two test probes are respectively contacted with the cathode pole of the battery and the surface of the cover plate of the battery; the right ends of the two test probes are connected with the detection end of the battery shell voltage test equipment. The invention can simultaneously complete the testing of the open-circuit voltage, the internal resistance, the shell pressure and the thickness of the battery, and obviously improve the testing efficiency.

Description

Lithium battery performance test system
Technical Field
The invention relates to the technical field of batteries, in particular to a lithium battery performance testing system.
Background
With the increasing maturity and perfection of electric automobile technology, hybrid electric vehicles and electric automobiles have entered the daily lives of people, audiences and people are increasing, and the lithium ion power battery is used as an important component of an electric automobile, and the performance of the lithium ion power battery directly influences the normal use of the electric automobile.
In the process of popularization of electric automobiles, higher requirements are continuously provided for vehicle-mounted high-capacity power batteries, the performance of the vehicle-mounted high-capacity power batteries directly influences the overall performance of the electric automobiles, and batteries with higher safety, more excellent electrical properties and lighter weight need to be continuously developed.
Based on the rapid development of the lithium battery industry, the development and production period of batteries with high capacity and new models is shorter and shorter, and for the production line of small-batch experiments, production and frequent switching of battery models, in the later battery sorting test link, if full-automatic test sorting equipment is purchased, the purchase period is long, the economic investment is large, manual testing is often selected to be more economic, but the existing manual testing and data integration work is complex in operation and often has higher labor cost.
It should be noted that, the battery screening is mainly to classify and select the battery performance through simple performance testing, generally speaking, mass production batteries need to use automated testing and sorting equipment in the sorting testing link in the later stage of manufacturing, and the testing items include: positive and negative electrode voltages (open circuit voltage), battery internal resistance, case voltage, battery thickness;
the open-circuit voltage is the potential difference between the electrodes when the battery is not connected with an external circuit and is equal to the difference between the positive electrode potential and the negative electrode potential. The charge retention capacity of the battery is tested by testing the voltage after the battery is kept still for a period of time, namely, the voltage dispersion point and the K value are utilized. The method selects the battery with self-discharge defects, and the abnormal attenuation of the battery voltage is mainly influenced by factors such as the manufacturing process, materials, storage conditions and the like of the lithium battery, so the open-circuit voltage of the battery is an important parameter for measuring the performance of the battery. The battery with the abnormal voltage attenuation not only leads to the reduction of the capacity of the battery, once the battery is assembled into a module, after each charge and discharge, the self-discharge monomer can reach the cut-off voltage earlier than other monomers due to the problem of large differential pressure at the charge and discharge tail ends, so that the whole module cannot reach the tail end voltage required by design during the charge and discharge, the capacity and the energy of the module are limited, and the use requirement cannot be met. Along with the increase of the number of times of charging and discharging, the deterioration degree of the battery can be further aggravated, the cycle life of the whole module and even the system is influenced, the battery can be possibly out of control due to serious self-discharge, and therefore the safety problem of parking the electric automobile is caused.
The internal battery group is the resistance to the current flowing through the battery when the battery is in operation, and is generally divided into alternating current internal resistance and direct current internal resistance, and because the internal resistance of the rechargeable battery is very small, the electrode is easy to generate polarization internal resistance when the direct current internal resistance is measured, that is, the internal resistance of the battery comprises ohmic resistance (R omega) and polarization resistance (Rf) of the electrode during electrochemical reaction. Therefore, the result of the direct current test is not the true value of the internal resistance of the battery; the AC internal resistance can be measured to avoid the influence of polarization internal resistance and obtain the real internal group value. The increase of the internal resistance of lithium ions is accompanied by safety problems such as energy density reduction, voltage and power reduction, battery heat generation and other failures, so the internal resistance test is often used as an index for battery performance detection, life evaluation and state of health (SOH).
The battery case voltage is the voltage difference between the battery pole and the case (the pole is not connected with the case, including the positive case voltage and the negative case voltage, and the sum of the two is the open-circuit voltage of the battery, therefore, when the open-circuit voltage of the battery is known, the voltage of the battery case can be judged only by testing one pole case voltage): lithium ion battery with metal casing has good heat dissipation, advantages such as mechanical strength height, and the shell is not electrified battery and uses the sealing washer of polytetrafluoroethylene material to separate utmost point post and apron contact usually, and the security is higher, probably leads to the unusual reason of shell pressure: firstly, the battery cover is abnormal in material supply caused by the defects of overlapping of residual aluminum wires or PFA (sealing ring) in cover plate punching, and secondly, the manufacturing process is abnormal, so that solid welding slag is remained in the PFA melting or welding process; the direct contact between the positive and negative poles of the battery and the metal shell/cover plate or the deterioration of the insulation property of PFA (fluorinated ethylene fluoro-alkoxy) causes the shell voltage to be low, so that lithium ions are preferentially embedded into the aluminum shell through electrolyte in the charging and discharging processes to generate a lithium-embedded compound. If the voltage of the shell is low and lasts for a period of time, the battery can be corroded and even leaked, the sealing performance of the battery is influenced, and the normal and safe use of the battery is influenced. When the capacity of the battery is high and the internal pressure is relatively high, the battery is easy to leak liquid or gas after being assembled, great potential safety hazards are caused to the battery, meanwhile, the service life of the battery is shortened due to volatilization of the electro-hydraulic fluid or overhigh moisture, the internal resistance is increased, various parameter performances of the battery are affected, and finally the battery cannot be used continuously.
The thickness of the battery is an index with higher consistency requirement on PACK assembly. The size of the module assembly, the installation of the bracket and the bus bar, the assembly welding position and the like are influenced, and the method is one of important indexes of the assembly; meanwhile, the thickness of the battery is abnormal, and internal defects of the battery, such as battery wrinkles, dead zones or lithium precipitation, can be intuitively reflected.
Disclosure of Invention
The invention aims to provide a lithium battery performance testing system aiming at the technical defects in the prior art.
Therefore, the invention provides a lithium battery performance test system, which comprises a battery test carrier;
the battery test carrier comprises a test bottom plate, a test probe and a thickness measuring bracket;
the front end of the top of the testing bottom plate is provided with a thickness measuring bracket;
the top of the thickness measuring bracket is provided with a laser thickness measuring sensor;
the right end of the top of the test bottom plate is provided with a test probe bracket;
the front end and the rear end of the test probe support are respectively provided with a test meter pen mounting groove which is transversely penetrated;
each test meter pen mounting groove is internally provided with a test meter pen;
for two test meter pens, one test meter pen is a positive test meter pen, and the other test meter pen is a negative test meter pen;
the left end of the positive test meter pen is used for contacting a positive pole column of the battery to be tested;
the left end of the negative electrode test meter pen is used for contacting a negative electrode pole of the battery;
the right ends of the two test meter pens are correspondingly connected with detection ends on the open-circuit voltage and battery internal resistance test equipment;
the left side of the test probe bracket is provided with a plurality of test probe mounting holes which are distributed transversely;
wherein, in the two test probe mounting holes, one test probe can be selectively and respectively mounted;
the left ends of the two test probes are respectively contacted with the cathode pole of the battery and the surface of the cover plate of the battery;
the right ends of the two test probes are connected with the detection end of the battery shell voltage test equipment.
Preferably, the thickness measuring support is zigzag in shape.
Preferably, the thickness measuring stand comprises a top plate and a bottom plate;
the front end of the top flat plate is connected with the rear end of the bottom flat plate through a vertical plate.
Preferably, a laser thickness measuring sensor is arranged on the top flat plate;
and the laser thickness measuring sensor is used for measuring the thickness of the battery placed right below the laser thickness measuring sensor.
Preferably, a pushing cylinder is arranged at the left end of the top of the testing bottom plate;
the pushing plate is connected with the power output end on the right side of the pushing cylinder and is positioned on the right left side of the test probe support;
the battery to be tested is placed in a position between the pushing cylinder and the test probe holder.
Compared with the prior art, the lithium battery performance testing system provided by the invention has scientific design, can be widely applied to battery development stage testing or small-batch battery shipment testing, can complete battery open-circuit voltage, internal resistance, shell pressure and thickness testing, obviously improves the testing efficiency of the battery, reduces the testing cost, and has great practical significance.
In addition, the invention can automatically collect data and count data, and has the characteristics of high flexibility, short development period, low investment cost and high test efficiency.
Drawings
Fig. 1 is a schematic diagram of a testing principle of four terminal pairs of a daily BT4560 battery impedance tester as an open-circuit voltage and battery internal resistance testing device in a lithium battery performance testing system provided by the invention;
fig. 2 is a schematic top view of an integrated testing tool as a battery testing carrier in a lithium battery performance testing system according to the present invention;
fig. 3 is a schematic structural diagram of a test probe holder and a test probe in an integrated test fixture as a battery test carrier in a lithium battery performance test system according to the present invention;
fig. 4 is a schematic structural diagram of a thickness measurement bracket in an integrated test tool serving as a battery test carrier in a lithium battery performance test system provided by the present invention.
Detailed Description
In order to make the technical means for realizing the invention easier to understand, the following detailed description of the present application is made in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In addition, it should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the term "mounted" and the like should be interpreted broadly, and may be, for example, either fixedly mounted or detachably mounted.
The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.
Referring to fig. 1 to 4, the present invention provides a lithium battery performance testing system, including a battery testing carrier;
the battery test carrier comprises a test base plate 1, a test probe 2 and a thickness measuring bracket 3;
the thickness measuring bracket 3 is arranged at the front end of the top of the testing bottom plate 1;
the top of the thickness measuring bracket 3 is provided with a laser thickness measuring sensor;
the right end of the top of the test bottom plate 1 is provided with a test probe bracket 20;
wherein, the front and rear ends of the test probe holder 20 are respectively provided with a test meter pen mounting groove 200 (i.e. a square hole groove) which is transversely penetrated;
each test meter pen mounting groove 200 is provided with one test meter pen 5;
for two test meter pens 5, one of them is a positive test meter pen, and the other is a negative test meter pen;
the left end of the positive electrode test meter pen is used for contacting a positive electrode pole of a battery (particularly a lithium battery) to be tested;
the left end of the negative test meter pen is used for contacting a negative pole post of a battery (particularly a lithium battery);
the right ends of the two test meter pens 5 are correspondingly connected with detection ends on open-circuit voltage and battery internal resistance test equipment (particularly adopting a daily BT4560 voltage internal resistance tester);
it should be noted that, with the present invention, the open-circuit voltage and the internal resistance of the battery can be detected simultaneously by the open-circuit voltage and internal resistance testing device (specifically, by using the daily BT4560 voltage internal resistance tester).
Wherein, the left side of the test probe bracket 20 is provided with a plurality of test probe mounting holes 2 which are distributed transversely;
wherein, in the two test probe mounting holes 2, one test probe can be selectively and respectively mounted;
the left ends of the two test probes are respectively contacted with the cathode pole of the battery and the surface of the cover plate of the battery;
the right ends of the two test probes are connected with the detection end of a battery case voltage test device (particularly a daily BT3562 battery impedance tester).
It should be noted that, with the present invention, a voltage difference between the negative electrode terminal of the battery and the battery case (the battery cover plate is a part of the battery case) can be tested by a battery case voltage testing device (specifically, a japanese BT3562 battery impedance tester);
it should be noted that, for the present invention, the left side of the test probe support 20 has a plurality of test probe hole sites 2 distributed transversely, and two of the test probe hole sites 2 can be selected to install test probes according to the size and relative position of the post of the battery to be tested and the battery cover plate, so as to ensure that at least two probes are respectively contacted with the negative post and the battery cover plate, and in order to ensure the stability of the test, the number of the test probes can be increased as required.
In the present invention, the thickness measuring support 3 is in a zigzag shape.
In the present invention, in a specific implementation, the thickness measuring support 3 includes a top plate 31 and a bottom plate 32;
the front end of the top plate 31 and the rear end of the bottom plate 32 are connected by a vertical upright 33.
In the concrete implementation, a laser thickness measuring sensor is arranged on the top flat plate 31;
and the laser thickness measuring sensor is used for measuring the thickness of the battery placed right below the laser thickness measuring sensor.
In the present invention, for specific implementation, the open-circuit voltage and battery internal resistance testing device may adopt an existing device, for example, a japanese BT4560 battery impedance tester (i.e., a battery voltage and internal resistance tester) may be adopted, and the open-circuit voltage and battery internal resistance tests of the battery may be completed at the same time.
It should be noted that, referring to fig. 1, the japanese BT4560 device measures the internal impedance of the battery by using the ac 4 terminal test method, and the frequency range is 0.1 to 1050HZ, so that the low-frequency test can be realized, and the test result close to the true internal impedance value can be obtained more easily. And meanwhile, the direct-current voltage of the battery is measured, the resolution is 10uV, the test precision reaches 0.0035% rdg +/-5 dgt, and meanwhile, the temperature test which is very important for battery management can be carried out. The accuracy was. + -. 0.5 ℃.
In the present invention, in a concrete implementation, the battery case voltage testing device may adopt an existing device, for example, a japanese BT3562 battery impedance tester, and may complete the battery case voltage test.
It should be noted that the impedance tester for the daily BT3562 battery has the characteristics of high precision and high stability. The same BT4560 instrument, four-terminal pair test method, signal source for AC 1KHZ, resistance measurement range: 1 mu omega-3 k omega. Voltage measurement range: 100 μ V-60V, precision Range resistance: 0.3% voltage: 0.05 percent. The voltage and the internal resistance of the battery can be tested at the same time, but the internal resistance test cannot eliminate the influence of polarization internal resistance; and meanwhile, the battery cell sorting system is provided with data acquisition software, can realize automatic measurement, and is suitable for battery product sorting and factory inspection.
It should be noted that, the battery test carrier of the invention is an integrated test tool, and can be matched with other equipment to simultaneously realize multiple performance tests; for the invention, the functions of multi-condition data searching, data downloading, test data integration and management, data uploading, automatic data grading and the like can be realized through the open-circuit voltage and battery internal resistance test equipment and the matched data processing software on the battery shell voltage test equipment.
In the invention, in the concrete implementation, a pushing cylinder 4 is arranged at the left end of the top of the testing bottom plate 1;
the pushing plate connected with the power output end on the right side of the pushing cylinder 4 is positioned right on the left side of the test probe support 20;
a battery to be tested, which is laterally placed at a position between the push cylinder 4 and the test probe holder 20;
the positive pole post and the negative pole post of the battery are positioned on the right side of the battery.
It should be noted that, for the invention, the lithium battery to be tested is a square lithium battery, and the right side surface of the square lithium battery is provided with a positive pole post and a negative pole post which are distributed in the front and back. In the concrete implementation, during the test, the testing base plate is laid on the top of the testing base plate 1.
It should be noted that, for the specific implementation of the present invention, a battery is placed between the push cylinder 4 and the test probe holder 20, and the push cylinder 4 is pressed to make one end of each of two test styluses 5 (including one positive test styluse and one negative test styluse) contact with a positive electrode pole and a negative electrode pole of the battery, respectively, and the other end of each of the two test styluses 5 is connected to the BT4560 voltage internal resistance tester, and the BT4560 voltage internal resistance tester continuously tests for a preset time (for example, 5S), at this time, the BT4560 voltage internal resistance tester can simultaneously test the voltage and the internal resistance of the battery;
for the invention, 2 test probes 2 are selected to be installed and respectively contacted with the cathode pole of the battery and the surface of the cover plate of the battery, the other end of each test probe 2 is connected with a daily BT3562 impedance tester, the daily BT3562 impedance tester continuously tests for a preset time (for example, 5S), and the daily BT3562 impedance tester can test the pressure difference between the cathode pole of the battery and the battery shell;
for the present invention, the laser sensor (i.e. the laser thickness measuring sensor) on the thickness measuring support measures the distance variation to calibrate the thickness of the battery (for example, the laser distance measuring sensor can be used for detection, so that the thickness of the battery is equal to the difference between the test distance when the battery is not initially placed and the test distance after the battery is placed).
It should be noted that, for the present invention, the four tests of the open-circuit voltage, the internal resistance, the shell pressure and the thickness of the battery can be performed simultaneously, and of course, the four tests can also be performed selectively according to the selection of the user.
It should be noted that, for the laser thickness measuring sensor of the present invention, the existing laser thickness measuring sensor finished product equipment can also be directly adopted. The laser thickness measuring sensor is a sensor which can sense the thickness of a measured object and convert the thickness into a usable output signal (such as an analog current and voltage signal or a digital signal), is a known device, adopts an existing detection installation mode, and is not described herein again.
For the invention, the existing matched data processing software which passes through the open-circuit voltage and battery internal resistance test equipment and the battery case voltage test equipment (the BT4560 battery voltage and internal resistance tester and the daily BT3562 battery impedance tester) is software integrating data test and data processing, and the test software can realize the butt joint with a database sorting system and realize the functions of multi-condition data search, data download, test data integration and management, data upload, automatic data grading and the like.
In a specific implementation of the present invention, the testing device of the present invention further includes a code scanning device (e.g., a scanning gun) for scanning bar code information (e.g., two-dimensional code information) on the battery to obtain preset type information (e.g., model, specification, rated voltage, etc.) of the battery.
In a specific implementation aspect of the present invention, the testing device further includes an industrial computer, which is respectively connected to the data output end of the open-circuit voltage and battery internal resistance testing device, the data output end of the battery case voltage testing device, and the data output end of the code scanning device, and is configured to collect, store, and display battery data collected by the open-circuit voltage and battery internal resistance testing device, the battery case voltage testing device, and the code scanning device.
Based on the above technical solutions, the whole testing system of the present invention includes: the BT4560 voltage internal resistance tester, the daily BT3562 voltage internal resistance tester and the code scanning device are respectively connected with an industrial computer (namely a computer), the 4-terminal test meter pen, the test probe and the laser thickness measuring sensor are all fixed on an integrated test tool (specifically a test bottom plate), and the computer is provided with matched data processing software.
Before the test is started, firstly, opening the hardware equipment, and setting parameters and conditions for the test;
then, opening the existing matched data processing software, logging in and selecting a battery comprehensive test plate through the software, and inputting basic information of the battery, such as the model, the batch and the like according to prompts; checking the required test items and the corresponding test ports, and moving the cursor to the battery number input box after confirming that each test standard in the window is correct, thereby completing the preparation work before the test;
then, the battery pole is horizontally pushed into the test tool towards the direction of the test probe, positioning is carried out by the side edge of the tool, and the pushing cylinder is controlled to be started through a control pedal of the cylinder to position the bottom of the battery;
then, scanning the bar code of the battery by using a scanning gun, simultaneously displaying four test results on a test interface, stepping down a control pedal of the air cylinder, controlling the air cylinder to return, manually taking out the battery, and repeating the above operation to finish the test of all the batteries;
in the testing process, software matched with the BT4560 voltage internal resistance tester and the daily BT3562 voltage internal resistance tester counts the testing quantity and the passing rate in real time, and after the testing is finished, a battery comprehensive testing report can be generated, so that data integration, storage and database uploading are finished and are transmitted to an industrial computer (computer).
It should be noted that the invention designs a testing system which is simple and efficient to operate, and based on the testing system, the testing switching of the batteries with multiple sizes and multiple models can be completed by adjusting a simple testing tool. Hardware and software, from designing to processing life cycle can shorten to within 15 days, the remodelling is fast, the input amount of money is lower, area is little, compares with traditional single flowing water test, practices thrift the human cost, can further realize test data automatic integration, can reach not only economy but also accurate data processing effect, and from a long-term perspective, whole battery test system has certain realistic production practice meaning.
It should be noted that, for the present invention, it can analyze different communication instructions and data formats of each test device into the same form in a designated cache region through the supporting software installed on the industrial computer (upper computer), write the operations of increasing, deleting, modifying and checking the database into the database operation class developed autonomously, and use the uniform code to realize the integration and transmission of data; designing and using a test template with the same format as the database to realize the consistency with the transmission format of the database; meanwhile, the labor intensity of personnel is greatly reduced, software can add connected equipment including a laser range finder, a balance, a short-circuit tester and the like in a self-defined manner through setting serial port parameters and a communication protocol, test items are selected and test standards are set when the equipment is used, and a plurality of tests can be completed simultaneously by scanning a code by a battery; the data may be automatically integrated up into the database server. The software can also have the function of automatic sorting.
In addition, after the data such as voltage, internal resistance, thickness, weight of the current battery are obtained through code scanning test, software can automatically divide the battery to a corresponding grade through a set of sorting standard set by user definition, manual judgment and operation are reduced, and fool-proof and mistake-proof effects are achieved.
Finally, the software can also have a big data analysis function, and can automatically generate the test standards of different test items of different battery types by collecting the test data, the test sorting standard, the yield, the defective type and other information of various different items of a large number of batteries, predict and early warn the generation of defective batteries in defective batches, and further improve the delivery efficiency of products.
In conclusion, compared with the prior art, the lithium battery performance test system provided by the invention is scientific in design, can be widely applied to battery development stage tests or small-batch battery shipment tests, can simultaneously complete battery open-circuit voltage, internal resistance, shell pressure and thickness tests, obviously improves the test efficiency of the battery, reduces the test cost, and has great practical significance.
In addition, the invention can automatically collect data and count data, and has the characteristics of high flexibility, short development period, low investment cost and high test efficiency.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (5)

1. A lithium battery performance test system is characterized by comprising a battery test carrier;
the battery test carrier comprises a test base plate (1), a test probe (2) and a thickness measuring bracket (3);
the front end of the top of the testing bottom plate (1) is provided with a thickness measuring bracket (3);
the top of the thickness measuring bracket (3) is provided with a laser thickness measuring sensor;
the right end of the top of the test bottom plate (1) is provided with a test probe bracket (20);
wherein, the front end and the rear end of the test probe bracket (20) are respectively provided with a test meter pen mounting groove (200) which is transversely penetrated;
each test meter pen mounting groove (200) is internally provided with a test meter pen (5);
for two test meter pens (5), one of the test meter pens is a positive test meter pen, and the other test meter pen is a negative test meter pen;
the left end of the positive test meter pen is used for contacting a positive pole column of the battery to be tested;
the left end of the negative electrode test meter pen is used for contacting a negative electrode pole of the battery;
the right ends of the two test meter pens (5) are correspondingly connected with detection ends on the open-circuit voltage and battery internal resistance test equipment;
wherein, the left side of the test probe bracket (20) is provided with a plurality of test probe mounting holes (2) which are distributed transversely;
wherein, one test probe is selectively and respectively arranged in the two test probe mounting holes (2);
the left ends of the two test probes are respectively contacted with the cathode pole of the battery and the surface of the cover plate of the battery;
the right ends of the two test probes are connected with the detection end of the battery shell voltage test equipment.
2. The lithium battery performance test system of claim 1, characterized in that the thickness measuring support (3) is zigzag shaped.
3. The lithium battery performance test system of claim 1, characterized in that the thickness measuring support (3) comprises a top plate (31) and a bottom plate (32);
the front end of the top flat plate (31) is connected with the rear end of the bottom flat plate (32) through a vertical upright plate (33).
4. The lithium battery performance test system according to claim 3, wherein a laser thickness measuring sensor is mounted on the top plate (31);
and the laser thickness measuring sensor is used for measuring the thickness of the battery placed right below the laser thickness measuring sensor.
5. The lithium battery performance test system according to claim 1, wherein a push cylinder (4) is installed at the top left end of the test base plate (1);
the pushing plate connected with the power output end on the right side of the pushing cylinder (4) is positioned on the right left side of the test probe support (20);
the battery to be tested is placed in a position between the pushing cylinder (4) and the test probe holder (20).
CN202011563315.9A 2020-12-25 2020-12-25 Lithium battery performance test system Pending CN112630671A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114226357A (en) * 2021-11-23 2022-03-25 深圳华工新能源装备有限公司 Method and device applied to battery laser cleaning detection
CN114323123A (en) * 2021-12-14 2022-04-12 惠州锂威新能源科技有限公司 Battery cell measuring system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114226357A (en) * 2021-11-23 2022-03-25 深圳华工新能源装备有限公司 Method and device applied to battery laser cleaning detection
CN114323123A (en) * 2021-12-14 2022-04-12 惠州锂威新能源科技有限公司 Battery cell measuring system

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