CN102620993B - Battery pole piece flexibility characterization method and suppleness test device - Google Patents
Battery pole piece flexibility characterization method and suppleness test device Download PDFInfo
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- CN102620993B CN102620993B CN201210111542.7A CN201210111542A CN102620993B CN 102620993 B CN102620993 B CN 102620993B CN 201210111542 A CN201210111542 A CN 201210111542A CN 102620993 B CN102620993 B CN 102620993B
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Abstract
The invention discloses a kind of battery pole piece flexibility characterization method, it comprises the following steps: battery pole piece is cut to the rectangle of certain size by (1), and is rolled into the individual layer face of cylinder；(2) from the direction vertical with the battery pole piece face of cylinder, evenly the face of cylinder is applied pressure and is allowed to fixing elliptical deformation；(3) in deformation process, the shearing stress at detection two ends, cylinder pole piece left and right and the corresponding displacement at upper and lower two ends, obtain shearing stress displacement curve；(4) analyzing and processing shearing stress displacement curve, draws the suppleness token state of battery pole piece.Compared with prior art, battery pole piece flexibility characterization method of the present invention can rapidly and quantitatively test out the suppleness of battery pole piece, and measuring accuracy is greatly improved.Additionally, the invention also discloses a kind of battery pole piece flexibility test device.
Description
Technical field
The present invention relates to diaphragm Mechanics Performance Testing field, it is more particularly related to a kind of battery pole
Sheet suppleness characterizing method and relevant suppleness test device.
Background technology
Along with development and the enhancing of environmental consciousness of modern society, increasing equipment choice is with chargeable two
Primary cell is as power supply, and such as mobile phone, notebook computer, electric tool, electric automobile etc., this is for filling
The application of electricity secondary cell provides wide space with development, also proposes secondary cell higher simultaneously
Requirement, it is desirable to it can have higher capacity, good security and longer cycle life etc..
But, high power capacity requires that battery pole piece has higher coating weight and compacted density, and this all makes electricity
The suppleness of pond pole piece is deteriorated, especially positive plate.In the winding process of square electric cell pole piece, particularly
During positive plate bending, it is maximum that what the extruding shearing stress that volume heart both sides are subject to and outside were subject to draws high shearing stress, leads
Cause diaphragm easily to rupture in winding both sides；And when cylindrical electric core winding, the pole piece of winding inner ring is beaten
Wrinkle degree also suppleness with pole piece has much relations.Reforming process at the square electric cell with winding-structure
In, battery core is by from outside pressure, and deformation and shearing stress that the battery core pole piece at winding two ends produces are maximum,
Easily rupture.Visible, the pole piece of suppleness difference, on the one hand affect the excellent rate of rolling step, cause through
Ji loss, is on the other hand easily broken off and aluminium foil burr, diaphragm dry linting occurs, so that affecting the K value of battery core
Even security performance.
At present, the suppleness sign of battery pole piece mainly being had two kinds of methods, one of method is to use different-diameter
Spool wind pole piece, then distinguished the degree of crumpling of pole piece by naked eyes；The two of method are by battery pole piece
Stretch after doubling, and see if there is breach facing to light.Both approaches relies on the most largely
The subjective judgement of people, limited precision, the pole piece little for suppleness difference can not effectively be distinguished, also
Pole piece suppleness can not be carried out quantitatively characterizing.
In view of this, a kind of precision of necessary exploitation is higher battery pole piece flexibility characterization method and pliable and tough
Degree test device.
Summary of the invention
It is an object of the invention to: battery pole piece flexibility characterization method that a kind of precision is higher and pliable and tough is provided
Degree test device, carries out quantitatively characterizing with the suppleness to battery core pole piece.
In order to realize foregoing invention purpose, the invention provides a kind of battery pole piece flexibility characterization method, its
Comprise the following steps: battery pole piece is cut to the rectangle of certain size by (1), and is rolled into the individual layer face of cylinder；(2)
From the direction vertical with the battery pole piece face of cylinder, evenly the face of cylinder is applied pressure and is allowed to occur fixing ellipse
Circular change；(3) in deformation process, the shearing stress at detection two ends, cylinder pole piece left and right and the phase at upper and lower two ends
Answer displacement, obtain shearing stress-displacement curve；(4) analyzing and processing shearing stress-displacement curve, draws battery pole piece
Suppleness token state.
As a kind of improvement of battery pole piece flexibility characterization method of the present invention, described step (4) uses
Analysis and processing method is: cutting corresponding to two ends about when there is to fix deformation with the described battery pole piece face of cylinder
Stress characterizes the suppleness of pole piece.
As a kind of improvement of battery pole piece flexibility characterization method of the present invention, described step (4) uses
Analysis and processing method is: with the G-bar of described shearing stress-displacement curve to characterize the suppleness of pole piece.
As a kind of improvement of battery pole piece flexibility characterization method of the present invention, in described step (1), cutting obtains
The rectangle pole piece arrived is a size of: width 30-40 millimeter, length 100-110 millimeter.
As a kind of improvement of battery pole piece flexibility characterization method of the present invention, described step (2) is with little
The face of cylinder of pole piece is executed stressed by the speed in 2mm/s.
In order to realize foregoing invention purpose, the present invention also provides a kind of battery pole piece flexibility test device,
It includes dynamic load mechanism, dynamic signal acquisition unit, Dynamic Signal transfer unit and data processing unit,
Dynamic load mechanism includes mainframe, low speed cylinder, parallel platen and example platform, low speed cylinder and sample
Platform is fixed on mainframe, and pole piece to be tested is fixed on example platform, and parallel platen is fixed on low speed gas
Treating test pole piece on cylinder and play loading pressure effect, low speed cylinder, parallel platen and example platform are spatially
Vertical corresponding, dynamic signal acquisition unit and dynamic load mechanism are mechanically connected, dynamic signal acquisition unit,
Dynamic Signal transfer unit, data processing unit pass sequentially through signal and connect.
As a kind of improvement of battery pole piece flexibility of the present invention test device, the center line of described example platform
On be provided with two protruding rectangles location corals and two magnet being parallel to platform, one is exclusively used in fixing
The fixing card of battery pole piece is buckled and is offered two rectangular perforation, fixing snap through magnet and is positioned sample
On product platform.
As a kind of improvement of battery pole piece flexibility of the present invention test device, described dynamic signal acquisition unit
Including optical fibre displacement sensor and dynamic load sensor, optical fibre displacement sensor is located on parallel platen, uses
In detection parallel platen displacement variable in vertical direction, example platform is located at by dynamic load sensor
Below, for detecting the shearing stress suffered by pole piece two ends, the face of cylinder.
As a kind of improvement of battery pole piece flexibility of the present invention test device, described Dynamic Signal transfer unit
Being an electromagnetic signal converter, it processes single with optical fibre displacement sensor, dynamic load sensor and data
Unit sets up the signal of telecommunication respectively and connects, the electromagnetism that can optical fibre displacement sensor, dynamic load sensor be collected
Signal is converted into and is available for the signal of data processing unit identifying processing and is transferred to data processing unit, number
According to processing unit, the displacement received from dynamic signal transfer unit, shearing stress signal system are made shearing stress-position
Move curve.
As a kind of improvement of battery pole piece flexibility of the present invention test device, in described dynamic load mechanism
Spacing after parallel platen is depressed into bottom and between example platform is 8～16 millimeters.
Compared with prior art, battery pole piece flexibility characterization method of the present invention can rapidly and quantitatively test out electricity
The suppleness of pond pole piece, and measuring accuracy is greatly improved.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings and detailed description of the invention, to battery pole piece flexibility characterization method of the present invention, test
Device and Advantageous Effects thereof are described in detail.
Fig. 1 is the structural representation of battery pole piece flexibility of the present invention test device.
Fig. 2 is the example platform structural representation of battery pole piece flexibility of the present invention test device.
Fig. 3 is the battery pole piece before using battery pole piece flexibility characterization method of the present invention and test device to test
Force analysis figure.
Battery pole piece when Fig. 4 is to use battery pole piece flexibility characterization method of the present invention and test device to test
Force analysis figure.
Fig. 5 is that the displacement shearing stress that positive plate suppleness is affected by the compacted density using the present invention to record is bent
Line chart.
Detailed description of the invention
Battery pole piece flexibility characterization method of the present invention by being rolled into the individual layer face of cylinder by battery pole piece, more at the uniform velocity
Ground applies pressure and is allowed to fixing elliptical deformation its face of cylinder, and by whole deformation process is carried out
Force analysis reflects pliability under stress after battery pole piece winding.
Refer to Fig. 1 and Fig. 2, in order to realize said method, the invention provides a kind of battery pole piece flexibility
Test device, it includes dynamic load mechanism, dynamic signal acquisition unit, Dynamic Signal transfer unit 30 and
Data processing unit 40.Dynamic load mechanism and dynamic signal acquisition unit are mechanically connected, dynamic signal acquisition
Unit, Dynamic Signal transfer unit 30, data processing unit 40 pass sequentially through signal and connect.
Dynamic load mechanism includes mainframe 12, low speed cylinder 14, parallel platen 16 and example platform 18.
Wherein, low speed cylinder 14 is fixed on the top of mainframe 12, and parallel platen 16 is fixed on low speed cylinder 14
Bottom, example platform 18 is fixed on the bottom of mainframe 12 and is positioned under parallel platen 16, low speed gas
Cylinder 14, parallel platen 16 and example platform 18 are spatially vertical corresponding.On the center line of example platform 18
Being provided with two protruding rectangle location corals 180 and two magnet 182 being parallel to platform, one is exclusively used in
Two rectangular perforation are offered, fixing buckle 184 on the fixing buckle 184 of fixed cylinder face pole piece 60
It is positioned on example platform 18 by magnet 182.The above of low speed cylinder 14 is connected with air gauge, action
Then being controlled by precise pressure regulating valve, the parallel platen 16 under it is for the pole, the face of cylinder on example platform 18
Sheet 60 carries out loading pressure.
Dynamic signal acquisition unit includes optical fibre displacement sensor 22 and dynamic load sensor 24.Fiber optics displacement
Sensor 22 is located on parallel platen 16, for detecting parallel platen 16 change in displacement in vertical direction
Amount.Dynamic load sensor 24 is located at below example platform 18, is used for detecting face of cylinder pole piece 60 two ends
Suffered shearing stress.
Dynamic Signal transfer unit 30 is an electromagnetic signal converter, its with optical fibre displacement sensor 22, dynamic
State load transducer 24 and data processing unit 40 are set up the signal of telecommunication respectively and are connected, thus are passed by fiber optics displacement
The electromagnetic signal that sensor 22, dynamic load sensor 24 collect is converted into and is available for data processing unit 40 and knows
Other places reason signal and be transferred to data processing unit 40.
Data processing unit 40 is a computer, and its data processing module can be transmitting from Dynamic Signal
Displacement, shearing stress signal system that unit 30 receives are made shearing stress-displacement curve.
The principle of the present invention will be described in detail below.
Refer to Fig. 3, when face of cylinder pole piece 60 is fixed on example platform 18 start test before, the face of cylinder
Pole piece 60 in vertical direction only by the holding power N of self gravitation mg and example platform0.The two power is flat
Weighing apparatus power, namely mg=N0, now example platform 18 dynamic load sensor 24 below can be experienced
Pole piece pressure F '=N to example platform 180=mg.When test starts, by dynamic load sensor 24
The pressure gathered is zeroed out, and i.e. can test face of cylinder pole piece 60 and put down sample during stress and deformation
The pressure that platform 18 increases.
Referring to Fig. 4, face of cylinder pole piece 60 is deformation ovalisation under the vertical load that parallel platen 16 applies,
It is acted on by a pair equilibrant force in vertical direction, the most downward load F and holding power N upwards.
Owing to oval pole piece 60 is symmetrical structure, now takes its top half and carry out force analysis: as shown in Figure 4,
Oval pole piece 60 is by load F vertically downward in vertical direction, at transverse two ends then by 2
Individual shearing stress f vertically upward.In deformation process, example platform 18 dynamic load sensor 24 below
The pressure F ' collected is a pair active force and reaction force with it to the holding power N of pole piece, F '=N=F=2f,
Therefore the power F ' that sensor collects can reflect the shearing stress size that bending pole piece ellipse two ends are subject to.Due to multiple
Miscellaneous shearing stress regime theory solution does not exists, it is now assumed that pole piece is line elastomer.
Can be obtained by oval perimeters formula:
Dl=(4dux-2πdu′)----(1)；
Can be obtained by Hook law:
Can be obtained by the principle of virtual work:
Fdu '=k (l-l0)(4dux-2πdu′)----(3)；
I.e. can get the relational expression of pressure and displacement to (3) by formula (1):
F=12ku '----(4)；
Wherein, the k=ES/l in formula (4)0, E is elastic modelling quantity, characterizes the energy of material opposing elastic strain
Power, its value is the lowest more is susceptible to elastic deformation, illustrates that suppleness is the best；S is the sectional area of pole piece 60；
l0For cylinder pole piece 60 initial circumferential length.Visible, in the case of pole piece 60 sectional area and length are fixing,
Pressure F is directly proportional to the elastic modelling quantity of material to the ratio of displacement components u ', it may be assumed that F/u '～E.Due to F '=N=F=2f,
Therefore F '/u '～E, say, that face of cylinder pole piece 60 occurs for 16 times fixing at the parallel platen of imposed load
Deformation time, the F ' value that dynamic load sensor 24 is collected can reflect the suppleness of pole piece: F ' is the biggest, says
The elastic modulus E of bright reflection pole piece material is the biggest, and the ability of its opposing elastic strain is the highest, is just more difficult to
Occurring elastic deformation, i.e. suppleness the poorest, therefore, when face of cylinder pole piece can be deformed upon by F ', both sides are cut
Stress f carries out quantitatively characterizing.
Owing to pole piece material is as supporter by foil, the common shape after compacting with the powder on surface and colloid
The material with complex become, is similar to reinforced concrete structure, the size of the elastic modulus E of its material and pole piece material
Material (formula), compacted density, coating weight etc. are relevant.Owing to pole piece compaction density, coating weight cause
The variable quantity of pole piece sectional area S is the least relative to the variable quantity of pole piece elastic modulus E, it can be considered that pole
Shearing stress f of sheet is only relevant with elastic modulus E, thus can with quantitatively characterizing different formulations, compacted density,
The degree of flexibility of the pole piece of coating weight.
Material with complex its shearing stress and dependent variable under the conditions of loading speed etc. do not meet linear relation, i.e. E exists
Being constantly change in loading procedure, it is the fastest that E increases, and shows that elastic answering resisted in loading procedure by material
The ability become is the strongest, is less susceptible to elastic deformation, and its suppleness is the poorest.Therefore, it can utilize pole
Sheet shearing stress judges the degree of flexibility of pole piece in loading procedure with the variation tendency of displacement.
In order to ensure the accuracy of measurement result, below the major parameter being correlated with the present invention is analyzed and
Set.
When using the suppleness of battery pole piece flexibility of the present invention test device to test battery pole piece 60, low speed gas
Cylinder 14 has the accelerator of 5mm when starting, the speed of service after startup should be less than 2mm/s, is preferably
0.5mm/s, this is to ensure that the movement velocity of parallel platen 16 is less than 2mm/s, to prevent due to parallel
Pressing plate 16 speed is fast and affects test result, increases pole piece shearing stress.The movement velocity pair of parallel platen 16
The impact of position stress test result refers to table 1.
Table 1, the movement velocity of parallel platen affect data to position stress test result
Parallel platen 16 is fixed on the bottom of low speed cylinder 14, its be depressed into bottom after with example platform 18
Distance can be come real by installing the steel ring of differing heights between the connecting rod of parallel platen 16 and low speed cylinder 14
Existing, conversion steel ring height can realize face of cylinder pole piece 60 is carried out deformation in various degree.Refer to table 2
Shown parallel platen 16 minimum point and the spacing of example platform 18 affect data to test error, in order to
Ensure test error less than 5%, after parallel platen 16 is depressed into bottom and the spacing of example platform 18 should be
In 8-16mm, the spacing that subsequent embodiment uses is 13mm.
The spacing of table 2, parallel platen and example platform affects data to test error
Refer to the shearing stress test result of the battery pole piece size shown in table 3 and correspondence thereof, for identical width
The pole piece of degree, pole piece is the longest, and the diameter on its face of cylinder being coiled into is the biggest.When the face of cylinder of different-diameter is subject to
To parallel platen 16 there is certain deformation in the power of vertical direction time, the big face of cylinder of diameter is relative to diameter
The little face of cylinder deforms upon bigger, and its shearing stress is bigger, such as the cathode pole piece of 30mm, from 90mm
In the length range of 110mm, its shearing stress value increases along with the increase of pole piece length.But, along with
Pole piece length continues to increase, and it is coiled into the face of cylinder is affected by self gravitation and strengthen, and is being not affected by parallel pressure
Before the pressure at right angle of plate 16, the face of cylinder being coiled into but presents ellipse.In this case, oval pole piece
The return-to-zero when shearing stress that has been subject to is tested, causes the shearing stress value finally recorded less than final deformation
Actual value, such as the pole piece of a width of 30mm, when length increases to 120mm, its test result reduces on the contrary.
Therefore, should ensure that tested pole piece 60 long enough, to ensure that test result is enough big, ensures tested pole piece again
Occur without ellipse during 60 winding and ensure the accuracy of test, the length of tested pole piece 60 need to be specified.According to
Battery pole piece size shown in table 3 and the shearing stress test result of correspondence, the cutting of rectangular cell pole piece
A size of grow 100～110mm and there is accurate and stable test result.When pole piece width is 30～50mm, band
The buckle 184 of holes can be intact fixing wound pole piece.
The shearing stress test result of table 3, battery pole piece size and correspondence thereof
Hereinafter the characterizing method and test device for using the present invention carries out the enforcement of battery pole piece flexibility measurement
Example.
For saving material, the present embodiment uses long 100mm, the battery pole piece of wide 30mm.Example platform 18
The spacing of on center line two location corals 180 is 20mm, two location coral 180 length, width and height be respectively 20mm,
3mm、2mm.Circular magnet 182 is positioned at the two ends of location coral 180 and embeds in example platform 18, on it
Surface is concordant with example platform 18；The two ends of battery pole piece 60 are cut with two location corals 180 for the face of cylinder respectively
Line, is coiled into the face of cylinder with example platform 18 as tangent plane.The buckle 184 of band holes is placed on battery pole piece 182
On, the holes of buckle 184 is corresponding, as shown in Figure 2 with two location corals 180 on example platform 18 respectively.
Buckle 184 can be held by the magnet 182 at coral 180 two ends, location firmly, thus fixes to be tested well
Battery pole piece 60.
After sample is fixing, open the power supply of dynamic load mechanism, and the displacement-force amount of data processing unit 40
Interface.Press the beginning key of click data processing unit 40, low speed cylinder while dynamic load organization switch
14 promote the parallel platen 16 tubular pole piece 60 on example platform 18 to move, optical fibre displacement sensor 22,
Dynamic load sensor 24 respectively by Real-time Collection to signal pass to Dynamic Signal transfer unit 30, dynamically
Signal transfer unit 30 converts electromagnetic signal into the signal being available for data processing unit 40 identifying processing, and
Pass it to data processing unit 40.Data processing unit 40 by signal through process and at its displacement-force
Amount graphically illustrates out in interface, eventually forms corresponding data file.Data file provides every 0.003s
The displacement gathered and shearing stress, and draw displacement shearing stress curve, the maximum shear stress in this deformation process
Basis for estimation as pole piece suppleness: pole piece shearing stress is the biggest, and suppleness is the poorest, the easiest brittle failure of pole piece.
For lithium battery pole slice, the shearing stress after there is certain deformation by test face of cylinder pole piece 60 finds,
Positive plate is more much larger than the shearing stress of negative plate, and shearing stress increases trend more along with the change of pressing plate displacement
Add substantially, illustrate that the elastic modelling quantity of positive plate is bigger than the elastic modelling quantity of negative plate, the energy of its elastoresistance deformation
Power is higher, and more difficult generation elastic deformation, suppleness is the most worse.This also with in bare electric core winding and battery core
In trimming, the fact that positive plate is more easily broken off than negative plate it is consistent.
Refer to Fig. 5, positive plate is the same from for coating weight, formula kind, records result and show: with
Pole piece compaction density to increase, pole piece produces fixing shearing stress corresponding to deformation and also increases, and this illustrates compacting
Density causes the most greatly the elastic modulus E of pole piece the biggest, and the ability of its elastoresistance deformation is the strongest, is more difficult to bullet
Property deformation, then the suppleness of pole piece is the poorest, is the most more easily broken off.Meanwhile, by Fig. 5 it can also be seen that
Face of cylinder pole piece loaded formed oval pole piece whole during, shearing stress also with pressing plate displacement and
Increasing, along with the raising of pole piece compaction density, the trend that pole piece shearing stress increases is the most obvious, then springform
The trend that amount E increases in loading procedure is the most obvious, and the ability of its elastoresistance deformation is the strongest, is more difficult to bullet
Property deformation, then the suppleness of pole piece is the poorest, is the most more easily broken off.
In sum, the present invention can measure pole piece when battery cylindrical face pole piece 60 occurs to fix deformation quantitatively
Shearing stress size corresponding to two ends, the elastic modulus E positive correlation of this power and pole piece 60, elastic modulus E is
Characterize material elastoresistance deformation ability, ability the strongest just be more difficult to occur elastic deformation, the easiest brittle failure,
Suppleness is the poorest, and thus result judges the suppleness degree of pole piece.Simultaneously can also be according to pole piece deformation
Time shearing stress judge its suppleness with the variation tendency of displacement, i.e. along with the increase of parallel platen displacement, no
The degree increased therewith with pole piece shearing stress, namely elastic modulus E is with the increase degree of parallel platen displacement,
It is the most obvious that E increases, and illustrates that the ability of its elastoresistance deformation is the strongest, is more difficult to elastic deformation, and suppleness is also
The poorest.The present invention tests device and has good resolution ratio 0.1gf, has the test result of pole piece shearing stress
Good discrimination and reappearance.The present invention tests the simple in construction of device, for battery positive/negative plate and
Other coating structure, plastic film are the most applicable, and the battery pole piece being particularly suited for having winding-structure is pliable and tough
Degree test, such as electrodes of lithium-ion batteries, nickel-metal hydride battery electrode, the test of suppleness of nickel-cadmium cell pole piece,
Can be used as the monitoring of different cultivars battery pole piece flexibility, tension force and shaping pressure regulation for auto reeling carry
For reference, it is also possible to the selection for the research and development of formula, parameter of colding pressing provides foundation, effectively prevents pole piece coiling
Brittle failure.
The announcement of book and teaching according to the above description, those skilled in the art in the invention can also be to above-mentioned
Embodiment carries out suitable change and amendment.Therefore, the invention is not limited in disclosed and described above
Some modifications and changes of the present invention be should also be as falling into the guarantor of the claim of the present invention by detailed description of the invention
In the range of protecting.Although additionally, employ some specific terms in this specification, but these terms are simply
Facilitate explanation, the present invention is not constituted any restriction.
Claims (9)
1. a battery pole piece flexibility characterization method, it is characterised in that comprise the following steps:
(1) battery pole piece is cut to the rectangle of certain size, and is rolled into the individual layer face of cylinder；
(2) from the direction vertical with the battery pole piece face of cylinder, evenly the face of cylinder is applied pressure and be allowed to occur
Fixing elliptical deformation；
(3) in deformation process, the shearing stress at detection two ends, cylinder pole piece left and right and the corresponding positions at upper and lower two ends
Move, obtain shearing stress-displacement curve；
(4) analyzing and processing shearing stress-displacement curve, draws the suppleness token state of battery pole piece.
Battery pole piece flexibility characterization method the most according to claim 1, it is characterised in that described step
Suddenly the analysis and processing method used in (4) is: about during the fixing deformation of described battery pole piece face of cylinder generation
Shearing stress corresponding to two ends characterizes the suppleness of pole piece.
Battery pole piece flexibility characterization method the most according to claim 1, it is characterised in that described step
Suddenly the analysis and processing method used in (4) is: with the G-bar of described shearing stress-displacement curve to characterize pole
The suppleness of sheet.
Battery pole piece flexibility characterization method the most according to any one of claim 1 to 3, its feature
Be, the rectangle pole piece that in described step (1), cutting obtains a size of: width 30-40 millimeter, length 100-110
Millimeter.
Battery pole piece flexibility characterization method the most according to any one of claim 1 to 3, its feature
It is, described step (2) is to execute stressed with the speed less than 2mm/s to the face of cylinder of pole piece.
6. battery pole piece flexibility test device, it is characterised in that include dynamic load mechanism, dynamically
Signal gathering unit, Dynamic Signal transfer unit and data processing unit, dynamic load mechanism include mainframe,
Low speed cylinder, parallel platen and example platform, low speed cylinder and example platform are fixed on mainframe, to be measured
Examination pole piece is fixed on example platform, and parallel platen is fixed on low speed cylinder to be treated test pole piece and play loading and execute
Pressure effect, low speed cylinder, parallel platen and example platform are spatially vertical corresponding, dynamic signal acquisition list
Unit and dynamic load mechanism are mechanically connected, at dynamic signal acquisition unit, Dynamic Signal transfer unit, data
Reason unit passes sequentially through signal and connects；Two protruding rectangles it are provided with on the center line of described example platform
Location coral and two magnet being parallel to platform, a fixing card being exclusively used in self-contained battery pole piece is buckled and is offered
There are two rectangular perforation, fixing snap through magnet and be positioned on example platform.
Battery pole piece flexibility the most according to claim 6 test device, it is characterised in that described dynamic
State signal gathering unit includes optical fibre displacement sensor and dynamic load sensor, and optical fibre displacement sensor is located at
On parallel platen, for detecting parallel platen displacement variable in vertical direction, dynamic load sensor
It is located at below example platform, for detecting the shearing stress suffered by pole piece two ends, the face of cylinder.
Battery pole piece flexibility the most according to claim 7 test device, it is characterised in that described dynamic
State signal transfer unit is an electromagnetic signal converter, itself and optical fibre displacement sensor, dynamic load sensing
Device and data processing unit are set up the signal of telecommunication respectively and are connected, can be by optical fibre displacement sensor, dynamic load sensing
The electromagnetic signal that device collects is converted into and is available for the signal of data processing unit identifying processing and is transferred to number
According to processing unit, data processing unit is the displacement received from dynamic signal transfer unit, shearing stress signal
It is fabricated to shearing stress-displacement curve.
Battery pole piece flexibility the most according to claim 6 test device, it is characterised in that described dynamic
Spacing after parallel platen in state load maintainer is depressed into bottom and between example platform is 8～16 millimeters.
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| CN101706375A (en) * | 2009-01-20 | 2010-05-12 | 海洋王照明科技股份有限公司 | Battery extrusion test device |
| CN102095637A (en) * | 2010-11-12 | 2011-06-15 | 中国建筑材料检验认证中心有限公司 | Method for assessing elastic modulus and strength of circular or circular-tube brittle material |
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| US20090049923A1 (en) * | 2007-03-13 | 2009-02-26 | Michael Rogers | Method and Device for Controlled Compression Bat Rolling and a Composite Bat Barrel Broken-In By Such Method |
| KR100939857B1 (en) * | 2008-02-20 | 2010-01-29 | 엘에스전선 주식회사 | Device for measuring flexibility |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101706375A (en) * | 2009-01-20 | 2010-05-12 | 海洋王照明科技股份有限公司 | Battery extrusion test device |
| CN102095637A (en) * | 2010-11-12 | 2011-06-15 | 中国建筑材料检验认证中心有限公司 | Method for assessing elastic modulus and strength of circular or circular-tube brittle material |
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