CN118937050B - Lithium battery test equipment fixture - Google Patents
Lithium battery test equipment fixture Download PDFInfo
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- CN118937050B CN118937050B CN202411418989.8A CN202411418989A CN118937050B CN 118937050 B CN118937050 B CN 118937050B CN 202411418989 A CN202411418989 A CN 202411418989A CN 118937050 B CN118937050 B CN 118937050B
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 105
- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000006073 displacement reaction Methods 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 9
- 238000001125 extrusion Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000001467 acupuncture Methods 0.000 abstract description 2
- 230000008093 supporting effect Effects 0.000 description 19
- 238000001514 detection method Methods 0.000 description 18
- 238000003825 pressing Methods 0.000 description 14
- 230000006872 improvement Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000009778 extrusion testing Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000009864 tensile test Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- 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
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本发明公开了一种锂电池测试设备工装夹具，涉及锂电池测试技术领域，包括底座；驱动机构，其安装在底座上，驱动机构用于驱动左工件台与右工件台在水平方向上相互靠近或相互远离，定义左工件台或右工件台的移动方向为左右方向；左工件台，其用于固定锂电池，左工件台包括安装在驱动机构上的左滑块；有益效果在于：本工装夹具提高了锂电池可检测的项目，适应性更好。除跌落测试及振动测试外，本发明可完成挤压、针刺、冲击、弯折扭曲、拉伸等各种常规检测项目，有利于企业对生产的锂电池进行更全面的检测。
The present invention discloses a fixture for lithium battery testing equipment, which relates to the technical field of lithium battery testing, including a base; a driving mechanism, which is installed on the base, the driving mechanism is used to drive the left worktable and the right worktable to approach or move away from each other in the horizontal direction, and the moving direction of the left worktable or the right worktable is defined as the left and right direction; the left worktable is used to fix the lithium battery, and the left worktable includes a left slider installed on the driving mechanism; the beneficial effect is that the fixture improves the items that can be detected by the lithium battery and has better adaptability. In addition to drop tests and vibration tests, the present invention can complete various conventional test items such as extrusion, acupuncture, impact, bending and twisting, and stretching, which is conducive to enterprises to conduct more comprehensive testing of the lithium batteries produced.
Description
Technical Field
The invention relates to the technical field of lithium battery testing, in particular to a fixture clamp of lithium battery testing equipment.
Background
Lithium batteries are rechargeable batteries that are widely used in the fields of portable electronic devices, electric vehicles, energy storage systems, and the like due to their high energy density, long cycle life, low memory effect, and the like.
The square lithium battery is a rectangular or square lithium ion battery, is more efficient than a cylindrical battery in space utilization, and is particularly widely applied to the fields of electric vehicles, electric automobiles and the like in occasions needing large-area pavement.
In addition to circuit testing, lithium batteries also require mechanical performance testing, which is critical to ensure their safety, reliability, and durability under a variety of use environments and conditions. The mechanical performance test is to evaluate whether the battery will cause internal short circuit, thermal runaway, explosion or fire safety risks when suffering physical damage through simulating mechanical stress under real use or extreme conditions, such as extrusion, impact, vibration, drop, needling, bending or twisting, scratch, abrasion resistance and other tests. This is critical to ensuring user safety and preventing battery-induced disasters. In addition, the tensile strength, the area reduction, the elongation, the yield strength, the plasticity and other performance indexes of the lithium battery part are obtained by testing the tensile strength, the compression and the like.
Besides the finished lithium battery, the internal parts of the lithium battery, especially the key parts, need to be tested one by one, so that the detection items are relatively more, the mechanical performance test needs to be carried out by means of a plurality of devices and matched fixture, the plurality of detection devices occupy more space on one hand, and on the other hand, the detection devices and the matched fixture also increase the input cost, so that the comprehensive mechanical performance detection of the lithium battery is not facilitated for some small and medium enterprises.
The utility model patent with the publication number of CN209027909U discloses an extrusion test fixture based on a square shell lithium battery with variable size, and the fixture can clamp and fix the square shell lithium ion battery with a certain length, a certain width and a certain height in a high size range, so that extrusion experiments are carried out, the practicability is stronger, the experiment period is quickened by reducing the tool manufacturing period, the tool manufacturing cost is greatly reduced for enterprises, the product development period and the tool storage and preservation cost are greatly reduced for enterprises.
However, this solution also has certain limitations, and in the extrusion test, it is prescribed in the national standard (GB/T31486-2015) that the battery is placed between two parallel extrusion plates, and it is generally required to apply extrusion in the weakest point or predetermined direction of the battery, to apply extrusion force of 13 kN to the battery, and to hold it for 1 minute, or until the battery breaks. In the above-mentioned disclosed technical scheme, a support is required to be additionally arranged at the bottom of the lithium battery during testing. And the fixture detection item is relatively single.
In order to improve the detection item of frock clamp, among the prior art, multi-functional lithium cell test frock clamp has appeared, through pressing from both sides tight fixedly to lithium cell both ends, can realize the test of multiple items such as lithium cell extrusion, impact, acupuncture, tensile. In the test, a new problem is found, firstly, because the gap between a lithium battery workpiece to be tested and a base is relatively small after the lithium battery workpiece is installed, the bearing plate below the lithium battery is regulated in a manual regulation mode, when in extrusion detection, the bearing plate is regulated to be attached to the bottom of the lithium battery to support the lithium battery, when in bending test, the bearing plate is downwards regulated to separate the bearing plate from the lithium battery, the bearing plate is required to be manually regulated for many times in the test process, so that the detection efficiency is reduced, and secondly, in the tensile test (the test mainly aims at internal parts of the lithium battery), the parts of the lithium battery to be tested are fixed on two workpiece tables through a pressing plate and bolts, because the bolt screwing force of different operators is different, the loosening of the parts of the lithium battery possibly occurs in the test, when the loosening deviation is overlarge, the parts can be directly observed by naked eyes, but the partial deviation is small, the parts of the deviation is difficult to observe by naked eyes, and the test result may deviate.
Disclosure of Invention
The invention aims to solve the problems and provide a fixture for lithium battery test equipment.
The invention realizes the above purpose through the following technical scheme:
a lithium battery test equipment fixture, comprising:
A base;
The driving mechanism is arranged on the base and used for driving the left workpiece table and the right workpiece table to be close to or far from each other in the horizontal direction, and the moving direction of the left workpiece table or the right workpiece table is defined as the left-right direction;
the left workpiece table is used for fixing the lithium battery and comprises a left sliding block arranged on the driving mechanism, a left mounting table is connected to the left sliding block through bolts, a left workpiece groove for placing the lithium battery is formed in the left mounting table, a left displacement sensor for detecting displacement of the lithium battery is arranged on one side, far away from the right workpiece table, of the left workpiece groove, and a left pressing plate for fixing the lithium battery is arranged above the left mounting table;
The right workpiece table is used for fixing the lithium battery and comprises a right sliding block arranged on the driving mechanism, a right mounting table is arranged on the right sliding block, a right workpiece groove for placing the lithium battery is formed in the right mounting table, a right displacement sensor for detecting the displacement of the lithium battery is arranged on one side, far away from the left workpiece table, of the right workpiece groove, and a right pressing plate for fixing the lithium battery is arranged above the right mounting table;
The support mechanism is arranged between the left workpiece table and the right workpiece table and is used for supporting the bottom of the lithium battery, and comprises a bearing plate which can be lifted up and down, and a lifting structure for driving the bearing plate to lift is arranged at the bottom of the bearing plate;
And one end of the pressure sensor is connected with the left workpiece table, and the other end of the pressure sensor is connected with the right workpiece table.
By adopting the technical scheme, the clamping step is simplified, and the detection precision is improved. The lifting supporting mechanism can quickly adjust the height of the bearing plate, and is convenient to adjust. Through setting up left displacement sensor and right displacement sensor, when carrying out tensile test, both ends are contacted with left displacement sensor and right displacement sensor respectively about the lithium cell spare part, if the lithium cell spare part position takes place the skew in the test process, but left displacement sensor and right displacement sensor record offset and transmit to outside computer or industrial computer, be favorable to the control variable, improve detection precision.
As a further improvement, bosses are arranged at two ends of the top of the base.
By adopting the technical scheme, each part of the driving mechanism is convenient to install.
As a further improvement, the driving mechanism comprises a double-end screw rod arranged between two bosses, two ends of the double-end screw rod are respectively connected with the two bosses through bearings, a driving motor for driving the double-end screw rod to rotate is arranged on one boss, guide rods for guiding are arranged on the front side and the rear side of the double-end screw rod, two ends of the guide rods are respectively fixedly connected with the two bosses, and the left sliding block and the right sliding block are respectively connected with the double-end screw rod through threads.
Through adopting above-mentioned technical scheme, can accurate control left side workpiece table and right side workpiece table between the distance, the lithium cell of convenient adaptation different models can carry out test such as tensile simultaneously. The double-end screw rod is provided with two sections of threads, the directions of the threads of the two sections of threads are opposite, and when the driving motor drives the double-end screw rod to rotate forwards or reversely, the left workpiece table and the right workpiece table are close to each other or far away from each other.
As a further improvement, the top of the right sliding block is fixedly provided with a bearing table, the bearing table is arranged on one side, far away from the left workpiece table, of the right mounting table, the right mounting table is rotationally connected with the bearing table through a rotating shaft, the bearing table is also provided with a limiting pin arranged along the horizontal direction, and the right mounting table is provided with a blind hole matched with the limiting pin;
A gap is arranged between the right mounting table and the right sliding block, so that the right mounting table can rotate around the rotating shaft after the limiting pin is separated from the blind hole.
By adopting the technical scheme, the torsion test can be performed on the thin lithium battery or the lithium battery parts. When the limiting pin is taken out, the right mounting table is released from limiting, and at the moment, the front end or the rear end of the right mounting table is pressed down by the testing equipment, so that the right mounting table can rotate around the rotating shaft, and the torsion test is completed.
As a further improvement, a limiting plate is arranged between the right mounting table and the right sliding block, and a gap between the right mounting table and the right sliding block is filled, so that the stability of the right mounting table is improved.
By adopting the technical scheme, the bending damage of the rotating shaft in the testing process is prevented.
As a further improvement, a limit hole is further formed below the blind hole, the limit hole is communicated with the blind hole, a limit shaft is slidably assembled in the limit hole, a spring is sleeved on the limit shaft, a sealing plate for limiting the limit shaft is connected to the bottom of the limit hole through a screw, and a matching hole matched with the limit shaft is formed in the top of the limit plate;
the end part of the limiting pin is of a hemispherical structure or a conical structure, so that after the limiting pin is inserted into the blind hole, the limiting pin is extruded to shrink downwards and clamped into the matching hole, and the limiting plate is prevented from shifting.
By adopting the technical scheme, the limiting plate can be rapidly limited or released, and the operation steps are simplified.
As a further improvement, bearing plate bottom fixedly connected with telescopic link, elevation structure includes two telescopic cylinder that horizontal installation is on the base, and two telescopic cylinder follow fore-and-aft direction symmetrical arrangement, and telescopic cylinder's output shaft fixedly connected with supporting shoe, the supporting shoe top is equipped with the wedge that is used for driving the bearing plate and goes up and down.
By adopting the technical scheme, the height of the bearing plate does not need to be manually adjusted, and the stability is good. Because in the test process, the interval of lithium cell distance base is limited to and actuating mechanism's influence, if adopt pneumatic elevation structure, then only can adopt small-size cylinder, the actuating force that such cylinder provided is limited relatively, when the hydraulic mechanism of lithium cell top applys decurrent power, the bearing plate can the skew downwards, and the cylinder also easily appears gas tightness scheduling problem because of receiving great pressure, and then leads to the cylinder to damage, consequently adopts manual mode to adjust the bearing plate at present more. In view of the problem, the invention realizes the lifting of the bearing plate by adopting the horizontally arranged telescopic cylinder and wedge block structure, on one hand, the horizontally arranged telescopic cylinder with larger model can be used because the space in the horizontal direction is relatively larger, and on the other hand, when the test equipment applies downward pressure from the upper side, the force applied by the wedge block is decomposed into a downward force and a horizontal force, so that the force required to be born by the telescopic cylinder is shared, and the stability of the supporting mechanism is improved.
As a further improvement, the left sliding block side surface is fixedly connected with a left extending block, the right sliding block side surface is fixedly connected with a right extending block, and the pressure sensor is respectively and fixedly connected with the left extending block and the right extending block.
As a further improvement, the right extending block is provided with an adjusting hole which is a rectangular hole.
By adopting the technical scheme, the lithium battery with different models is conveniently adapted.
Compared with the prior art, the invention has the beneficial effects that:
1. This frock clamp has improved the detectable project of lithium cell, and adaptability is better. Besides drop test and vibration test, the invention can complete various conventional detection projects such as extrusion, needling, impact, bending, twisting, stretching and the like, and is beneficial to the more comprehensive detection of the produced lithium batteries by enterprises.
2. By arranging the left displacement sensor and the right displacement sensor, the displacement parameters of the lithium battery or parts inside the lithium battery in the test process can be recorded in detail, and the accuracy of the detection result is improved.
3. The right mounting table is connected to the bearing table through the rotating shaft, and in the torsion test, the torsion test equipment is not needed to be additionally arranged, and the right mounting table can be rotated only by applying downward force to the front end or the rear end of the right mounting table through the existing test equipment so as to perform the torsion test.
4. The supporting mechanism of the invention adopts the horizontally arranged telescopic cylinder to realize the lifting of the bearing plate, thereby not only being more convenient to operate, but also having good stability and greatly reducing the failure rate of the cylinder.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a perspective view of a fixture for a lithium battery test device according to the present invention.
Fig. 2 is a top view of the fixture for the lithium battery test equipment.
Fig. 3 is a section A-A of fig. 2.
Fig. 4 is a schematic diagram of a partial structure of a fixture for a lithium battery test device according to the present invention.
The reference numerals are explained as follows:
100. Base, 110, boss, 200, driving mechanism, 210, driving motor, 220, double-head screw, 230, guide rod, 300, left workpiece table, 310, left mounting table, 311, left workpiece groove, 320, left pressing plate, 330, left extending block, 340, left displacement sensor, 350, left sliding block, 400, supporting mechanism, 410, bearing plate, 420, supporting block, 421, wedge block, 430, telescopic cylinder, 440, telescopic rod, 500, right workpiece table, 510, right pressing plate, 520, right mounting table, 521, right workpiece groove, 522, limiting hole, 523, limiting shaft, 524, spring, 525, sealing plate, 530, bearing table, 540, rotating shaft, 550, limiting pin, 560, right extending block, 561, adjusting plate, 570, limiting plate, 580, right displacement sensor, 590, right sliding block, 600, pressure sensor.
Detailed Description
The following description of the embodiments of the present invention will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the prior art, the lithium battery and the key parts inside the lithium battery have more detection items, and if the lithium battery is subjected to relatively comprehensive test, various detection devices and matched fixture are needed. For small and medium enterprises, the investment is relatively large, and if the detection items are reduced, the prior development and the quality inspection of products can have adverse effects.
In view of the above problems, the left workpiece table and the right workpiece table are driven to be close to or far from each other by the driving mechanism, so that the lithium battery tester is beneficial to adapting to different lithium batteries, and can also perform tests such as stretching and compression. And each part is connected in a detachable way, if the left mounting table is connected with the left sliding block through bolts, the corresponding left mounting table is replaced if part of the lithium battery cannot be matched, and the right mounting table is the same. The right mounting table is connected to the bearing table through the rotating shaft, in the torsion test, the torsion test equipment is not needed to be additionally arranged, the right mounting table can be rotated by only applying downward force to the front end or the rear end of the right mounting table through the existing test equipment, so that the torsion test can be performed, the limit of the right mounting table is relieved very conveniently, and the quick switching is realized. The supporting mechanism adopts the telescopic cylinder that the level set up to drive the bearing plate and goes up and down, has better supporting effect, has avoided the bearing plate to move down and influence the testing result in the testing process.
The fixture disclosed by the invention reduces the cost required to be input for the full-scale test by improving the test accuracy, the types of test items, the stability of the fixture, the suitability of the lithium battery and the like, and is beneficial to the product research and development and quality control of enterprises.
Having described the basic principles of the present invention, various non-limiting embodiments of the invention are described in detail below. Any number of elements in the figures are for illustration and not limitation, and any naming is used for distinction only and not for any limiting sense.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments thereof.
As shown in fig. 1 to 4, the fixture for the lithium battery test equipment includes a base 100, a driving mechanism 200, a left workpiece stage 300, a right workpiece stage 500, a supporting mechanism 400 and a pressure sensor 600, and it should be noted that in this embodiment, the left workpiece stage 300 is only opposite to the right workpiece stage 500.
As shown in fig. 1-3, the base 100 is a rectangular metal plate, two ends of the top of the base 100 are provided with bosses 110, and the bosses 110 are fixed on the base 100 through bolts;
As shown in fig. 1-3, a driving mechanism 200 is installed on a base 100, the driving mechanism 200 is used for driving a left workpiece table 300 and a right workpiece table 500 to be close to or far from each other in a horizontal direction, a moving direction of the left workpiece table 300 or the right workpiece table 500 is defined to be a left-right direction, the driving mechanism 200 comprises a double-end screw 220 arranged between two bosses 110, the double-end screw 220 is in the prior art and is provided with two sections of threads with opposite directions, two ends of the double-end screw 220 are respectively connected with the two bosses 110 through bearings, a driving motor 210 for driving the double-end screw 220 to rotate is installed on one boss 110, the driving motor 210 is a servo motor, the driving motor 210 is meshed with the double-end screw 220 through a gear, a mounting groove is formed in the boss 110 where the driving motor 210 is located, the top of the mounting groove is sealed by an access board, and error contact of the gear is avoided, guide rods 230 for guiding are arranged on the front side and the rear side of the double-end screw 220, and two ends of the guide rods 230 are respectively fixedly connected with the two bosses 110.
The driving mechanism 200 can accurately control the distance between the left workpiece table 300 and the right workpiece table 500, is convenient for adapting to lithium batteries of different models, and can perform tests such as stretching.
The left and right work tables 300 and 500 are each mounted on the driving mechanism 200.
As shown in fig. 1-3, the left workpiece table 300 includes a left slider 350 mounted on the driving mechanism 200, the left slider 350 is connected with the double-headed screw 220 through threads, a left mounting table 310 is connected to the left slider 350 through bolts, a left workpiece groove 311 for placing a lithium battery is formed in the left mounting table 310, the left workpiece groove 311 is convenient for positioning the lithium battery, in other embodiments, a left displacement sensor 340 for detecting displacement of the lithium battery is mounted on a side of the left workpiece groove 311 away from the right workpiece table 500, a left pressing plate 320 for fixing the lithium battery is arranged above the left mounting table 310, a positioning groove matched with the left pressing plate 320 is further formed in the left mounting table 310, the left pressing plate 320 is convenient for positioning the left pressing plate 320, a positioning groove is also formed in the right mounting table 520, and the left pressing plate 320 is fixed on the left mounting table 310 through a butterfly bolt, so that the left pressing plate 320 is convenient for removing the left pressing plate 320. In the present embodiment, the left displacement sensor 340 is a contact displacement sensor, which has high sensitivity and relatively low cost.
As shown in fig. 1-3, the right workpiece table 500 includes a right slider 590 mounted on the driving mechanism 200, the right slider 590 is in threaded connection with the double-headed screw 220, a bearing table 530 is fixedly mounted at the top of the right slider 590, the bearing table 530 is disposed at one side of the right mounting table 520 far away from the left workpiece table 300, the right mounting table 520 is disposed at one side of the bearing table 530 near the left workpiece table 300, the right mounting table 520 is rotationally connected with the bearing table 530 through a rotating shaft 540, the rotating shaft 540 is connected with the bearing table 530 through a bearing, the rotating shaft 540 is connected with the right mounting table 520 through a bolt, the right mounting table 520 is conveniently detached, a limiting pin 550 is disposed along the horizontal direction on the bearing table 530, a blind hole matched with the limiting pin 550 is formed in the right mounting table 520, and in order to conveniently fix the limiting pin 550, in this embodiment, the limiting pin 550 is provided with a small thread section, and is conveniently connected with the bearing table 530, and the limiting pin 550 is prevented from loosening.
The right slider 590 is provided with a right mounting table 520, the right mounting table 520 is provided with a right workpiece groove 521 for placing a lithium battery, one side of the right workpiece groove 521 far away from the left workpiece table 300 is provided with a right displacement sensor 580 for detecting the displacement of the lithium battery, and a right pressing plate 510 for fixing the lithium battery is arranged above the right mounting table 520. The right displacement sensor 580 is identical in structure to the left displacement sensor 340, but in order to avoid the rotating shaft 540, the position of the right displacement sensor 580 should be disposed at the front side or the rear side of the rotating shaft 540.
In this embodiment, a gap is provided between the right mounting table 520 and the right slider 590, so that the right mounting table 520 can rotate around the rotation axis 540 after the limiting pin 550 is separated from the blind hole. Thus, the thin-sheet lithium battery or the lithium battery part can be subjected to a torsion test. When the limiting pin 550 is taken out, the right mounting table 520 is released from the limit, and the front end or the rear end of the right mounting table 520 is pressed down by the testing device, so that the right mounting table 520 can rotate around the rotating shaft 540, and the torsion test is completed.
A limiting plate 570 is arranged between the right mounting table 520 and the right sliding block 590, and fills the gap between the right mounting table 520 and the right sliding block 590, so as to improve the stability of the right mounting table 520 and prevent the bending damage of the rotating shaft 540 in the testing process.
As shown in fig. 4, a limiting hole 522 is further formed below the blind hole, the limiting hole 522 is communicated with the blind hole, a limiting shaft 523 is slidably assembled in the limiting hole 522, a spring 524 is sleeved on the limiting shaft 523, a sealing plate 525 for limiting the limiting shaft 523 is connected with a screw at the bottom of the limiting hole 522, and a matching hole matched with the limiting shaft 523 is formed in the top of the limiting plate 570;
The end of the limiting pin 550 is in a hemispherical structure or a conical structure (or a circular truncated cone-shaped mechanism), so that after the limiting pin 550 is inserted into the blind hole, the limiting shaft 523 is extruded to be contracted downwards and clamped into the matching hole, so as to prevent the limiting plate 570 from being deviated. Through the above structure, the limit plate 570 can be rapidly limited or released, and the operation steps are simplified.
As shown in fig. 1 and 3, a supporting mechanism 400 is disposed between the left and right work tables 300 and 500, the supporting mechanism 400 is used for supporting the bottom of the lithium battery, the supporting mechanism 400 comprises a bearing plate 410 capable of lifting up and down, and a lifting structure for driving the bearing plate 410 to lift is disposed at the bottom of the bearing plate 410;
The telescopic rod 440 is fixedly connected to the bottom of the bearing plate 410, the telescopic rod 440 mainly plays a role in guiding, the spring 524 can be arranged in the telescopic rod 440, the bearing plate 410 is guaranteed to be at the lowest end when no external force is applied, the lifting structure comprises two telescopic cylinders 430 which are horizontally arranged on the base 100, the two telescopic cylinders 430 are symmetrically arranged along the front-back direction, an output shaft of each telescopic cylinder 430 is fixedly connected with a supporting block 420, a sliding groove matched with the supporting block 420 is formed in the base 100, and a wedge-shaped block 421 for driving the bearing plate 410 to lift is arranged at the top of the supporting block 420.
The supporting mechanism 400 does not need to manually adjust the height of the bearing plate 410, and has good stability. Because the interval between the lithium battery and the base 100 is limited during the testing process and the driving mechanism 200 is affected, if a pneumatic lifting structure is adopted, only small-sized cylinders can be adopted, the driving force provided by such cylinders is relatively limited, when the hydraulic mechanism above the lithium battery applies downward force, the bearing plate 410 may shift downwards, and the cylinders are also easy to cause air tightness and other problems due to larger pressure, so that the cylinders are damaged, and the bearing plate 410 is currently adjusted manually. In view of this problem, the present invention realizes the lifting of the load bearing plate 410 by adopting the horizontally arranged telescopic cylinder 430 and wedge 421 structure, on one hand, since the space in the horizontal direction is relatively large, the horizontally arranged telescopic cylinder 430 can be used for a larger amount, and on the other hand, when the test equipment applies downward pressure from above, the force applied by the wedge 421 is decomposed into a downward force and a horizontal force, thereby distributing the forces required to be borne by the telescopic cylinder 430 and improving the stability of the present support mechanism 400.
In other embodiments, an inclined plane matching with the wedge 421 may be disposed at the bottom of the bearing plate 410, so as to increase the contact area between the wedge 421 and the bearing plate 410 and improve stability.
And a pressure sensor 600, wherein one end of the pressure sensor 600 is connected with the left work table 300, and the other end of the pressure sensor 600 is connected with the right work table 500. In this embodiment, the side surface of the left slider 350 is fixedly connected with a left extension block 330, the side surface of the right slider 590 is fixedly connected with a right extension block 560, and the pressure sensor 600 is respectively and fixedly connected with the left extension block 330 and the right extension block 560. The right extension block 560 is provided with an adjusting hole 561, and the adjusting hole 561 is a rectangular hole, so that the lithium batteries with different models can be conveniently adapted.
The lithium battery comprises the following detection steps:
The tool clamp is installed on conventional lithium battery testing equipment (generally pressure testing equipment or universal testing machine) in an extrusion test mode, and the equipment can apply pressure through hydraulic pressure or air pressure. When the extrusion test is entered, the left end and the right end of the lithium battery are respectively fixed on a left workpiece table and a right workpiece table, the telescopic cylinder drives the wedge block, the bearing plate is attached to the lower surface of the lithium battery, and then the lithium battery test equipment vertically applies pressure from the upper part to extrude the lithium battery until the pressure reaches 13kN or until the battery is damaged.
The tests such as impact and needling are the same as the above, and the lithium battery is fixed and then operated according to national standards.
During bending test, the bearing plate is adjusted to the lowest end, vertical downward force is applied to the lithium battery or parts inside the lithium battery, and data such as bending limit and whether liquid leakage exists in the bending state of the workpiece to be tested are tested. When the torsion test is carried out, the bearing plate is also adjusted to the lowest end, the limiting pin is taken out in a rotating mode, the limiting shaft is not extruded any more and is reset and ascended at the moment, limiting of the limiting plate is relieved, the limiting plate is taken out, vertical downward force is applied to the front end or the rear end of the right mounting table, the left mounting table is kept horizontal at the moment, the right mounting table rotates, the lithium battery or a part is twisted, and tolerance and other data of the lithium battery or the part are acquired.
During tensile and compression tests, two ends of a test piece to be tested are fixed on the left workpiece table and the right workpiece table, after the double-headed screw rotates, the left workpiece table and the right workpiece table are driven to be close to or far away from each other, the tensile and compression tests are performed, and data such as tensile strength and elongation at break are obtained.
Other detection items such as wear resistance test can also be fixed by adopting the fixture.
While there have been shown and described what are at present considered to be fundamental principles, main features and advantages of the present invention, it will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, but rather, the foregoing embodiments and description illustrate only the principles of the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
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| JP5445154B2 (en) * | 2010-01-18 | 2014-03-19 | 株式会社島津製作所 | Small material testing machine |
| KR101949106B1 (en) * | 2018-11-20 | 2019-02-15 | 영남대학교 산학협력단 | Testing Device for secondary Battery |
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| CN218239622U (en) * | 2022-09-19 | 2023-01-06 | 上海稳禾电子科技有限公司 | Detection apparatus for car metal stamping part |
| CN220663695U (en) * | 2023-08-29 | 2024-03-26 | 天道仓储物流港(迁安)有限公司 | Lifting table for logistics rack |
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