CN102620993A - Battery pole piece flexibility characterization method and flexibility testing device - Google Patents
Battery pole piece flexibility characterization method and flexibility testing device Download PDFInfo
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- CN102620993A CN102620993A CN2012101115427A CN201210111542A CN102620993A CN 102620993 A CN102620993 A CN 102620993A CN 2012101115427 A CN2012101115427 A CN 2012101115427A CN 201210111542 A CN201210111542 A CN 201210111542A CN 102620993 A CN102620993 A CN 102620993A
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Abstract
The invention discloses a battery pole piece flexibility characterization method, which comprises the following steps: (1) cutting a battery pole piece into a rectangular shape of a certain size, and rolling into a single-layer cylindrical surface; (2) applying pressure to the cylindrical surface from the a direction perpendicular to the battery pole piece cylindrical surface at an uniform speed to cause fixed elliptic deformation of the cylindrical surface; (3) during the process of deformation, testing the shear stresses at the left end and the right end of the cylindrical pole piece and the corresponding displacements at the upper end and the lower end of the cylindrical pole piece to obtain a shear stress-displacement curve; and (4) analyzing and processing the shear stress-displacement curve to obtain the characterized flexibility of the battery pole piece. Compared with the prior art, the battery pole piece flexibility characterization method disclosed by the invention can rapidly and quantitatively testing the flexibility of the battery pole piece, and the testing accuracy is greatly improved. In addition, the invention also discloses a battery pole piece flexibility testing device.
Description
Technical field
The present invention relates to diaphragm Mechanics Performance Testing field, more particularly, the present invention relates to a kind of battery pole piece suppleness characterizing method and relevant suppleness proving installation.
Background technology
Enhancing along with development of modern society and environmental consciousness; More and more equipments is selected with rechargeable secondary cell as power supply; Like mobile phone, notebook computer, electric tool, electric automobile or the like; This provides wide space for the application of rechargeable secondary cell and development, also secondary cell is had higher requirement simultaneously, hopes that it can have higher capacity, good security and long cycle life etc.
But high power capacity requires battery pole piece to have higher coating weight and compacted density, and this all makes suppleness variation, the especially positive plate of battery pole piece.In the winding process of square electric core pole piece, positive plate when bending particularly, the extruding shearing stress that volume heart both sides receive with outside receive draw high the shearing stress maximum, cause diaphragm to rupture in the coiling both sides easily; And when cylindrical electric core winding, the pole piece of the coiling inner ring degree of crumpling also has much relations with the suppleness of pole piece.In the shaping process of the square electric core with winding-structure, electric core receives the pressure from the outside, and deformation and shearing stress that the electric core pole piece at coiling two ends produces are maximum, very easily rupture.It is thus clear that the pole piece of suppleness difference influences on the one hand the excellent rate of coiling operation, causes economic loss, fracture and aluminium foil burr, diaphragm dry linting occur easily on the other hand, so that influence the K value even the security performance of electric core.
At present, the suppleness of battery pole piece is characterized the two kinds of methods that mainly contain, one of method is with the spool of the different-diameter pole piece of reeling, and distinguishes the degree of crumpling of pole piece again through naked eyes; Two of method is with stretching after the battery pole piece doubling, and sees if there is breach facing to light.These two kinds of methods all rely on people's subjective judgement largely, and precision is limited, can not effectively distinguish for the pole piece that the suppleness difference is little, can not carry out quantitatively characterizing to the pole piece suppleness.
In view of this, higher battery pole piece suppleness characterizing method and the suppleness proving installation of a kind of precision of necessary exploitation.
Summary of the invention
The objective of the invention is to: higher battery pole piece suppleness characterizing method of a kind of precision and suppleness proving installation are provided, carry out quantitatively characterizing with suppleness to electric core pole piece.
In order to realize the foregoing invention purpose, the invention provides a kind of battery pole piece suppleness characterizing method, it may further comprise the steps: (1) is cut to the rectangle of certain size with battery pole piece, and is rolled into the individual layer face of cylinder; (2) from the direction vertical, the elliptical deformation of evenly being exerted pressure and making it to fix in the face of cylinder with the battery pole piece face of cylinder; (3) in deformation process, detect the shearing stress and the corresponding displacement at two ends up and down of cylinder pole piece right ends, obtain shearing stress-displacement curve; (4) analyzing and processing shearing stress-displacement curve draws the suppleness sign amount of battery pole piece.
As a kind of improvement of battery pole piece suppleness characterizing method of the present invention, the analysis and processing method that adopts in the said step (4) is: the pairing shearing stress of right ends characterizes the suppleness of pole piece when with the said battery pole piece face of cylinder fixedly deformation taking place.
As a kind of improvement of battery pole piece suppleness characterizing method of the present invention, the analysis and processing method that adopts in the said step (4) is: the suppleness that characterizes pole piece with the average gradient of said shearing stress-displacement curve.
As a kind of improvement of battery pole piece suppleness characterizing method of the present invention, the rectangle pole piece that cutting obtains in the said step (1) is of a size of: width 30-40 millimeter, length 100-110 millimeter.
As a kind of improvement of battery pole piece suppleness characterizing method of the present invention, be to be exerted pressure in the face of cylinder of pole piece in the said step (2) with speed less than 2mm/s.
In order to realize the foregoing invention purpose; The present invention also carries has encircleed a kind of battery pole piece suppleness proving installation; It comprises dynamic load mechanism, dynamic signal acquisition unit, Dynamic Signal transfer unit and data processing unit; Dynamic load mechanism comprises mainframe, low speed cylinder, parallel pressing plate and example platform, and low speed cylinder and example platform are fixed on the mainframe, and pole piece to be tested is fixed on the example platform; Parallel pressing plate is fixed on to be treated the test pole piece and works the effect of exerting pressure that loads on the low speed cylinder; Low speed cylinder, parallel pressing plate and example platform are spatially vertical corresponding, and dynamic signal acquisition unit and dynamic load mechanism mechanical connection, dynamic signal acquisition unit, Dynamic Signal transfer unit, data processing unit connect through signal successively.
A kind of improvement as battery pole piece suppleness proving installation of the present invention; The center line of said example platform is provided with rectangle location coral and two magnet that are parallel to platform of two convexities; A fixed card that is exclusively used in the self-contained battery pole piece is buckled and is offered two rectangular perforation, and fixedly buckle is positioned on the example platform through magnet.
A kind of improvement as battery pole piece suppleness proving installation of the present invention; Said dynamic signal acquisition unit comprises optical fibre displacement sensor and dynamic load sensor; Optical fibre displacement sensor is located on the parallel pressing plate; Be used to detect parallel pressing plate displacement variable in vertical direction, the dynamic load sensor be located at example platform below, be used to detect the suffered shearing stress in pole piece two ends, the face of cylinder.
A kind of improvement as battery pole piece suppleness proving installation of the present invention; Said Dynamic Signal transfer unit is an electromagnetic signal converter; It is set up electric signal respectively with optical fibre displacement sensor, dynamic load sensor and data processing unit and is connected; Can with optical fibre displacement sensor, dynamic load sensor acquisition to electromagnetic signal convert to and can supply signal that data processing unit identification handles and send it to data processing unit, data processing unit makes shearing stress-displacement curve to the displacement, the shearing stress signal system that receive from dynamic signal transfer unit.
As a kind of improvement of battery pole piece suppleness proving installation of the present invention, the spacing that the parallel pressing plate in the said dynamic load mechanism is depressed between back, bottom and the example platform is 8～16 millimeters.
Compared with prior art, battery pole piece suppleness characterizing method of the present invention can test out the suppleness of battery pole piece fast quantification, and measuring accuracy improves greatly.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, battery pole piece suppleness characterizing method of the present invention, proving installation and useful technique effect thereof are elaborated.
Fig. 1 is the structural representation of battery pole piece suppleness proving installation of the present invention.
Fig. 2 is the example platform structural representation of battery pole piece suppleness proving installation of the present invention.
Fig. 3 is for using the preceding battery pole piece force analysis figure of battery pole piece suppleness characterizing method of the present invention and proving installation test.
Battery pole piece force analysis figure when Fig. 4 tests for using battery pole piece suppleness characterizing method of the present invention and proving installation.
Displacement-shearing stress curve map that the compacted density that Fig. 5 records for use the present invention influences the positive plate suppleness.
Embodiment
Battery pole piece suppleness characterizing method of the present invention is through being rolled into battery pole piece on the individual layer face of cylinder; The elliptical deformation of evenly being exerted pressure and making it to fix in its face of cylinder again, and reflect the battery pole piece pliability of back under pressure of reeling through whole deformation process being carried out force analysis.
See also Fig. 1 and Fig. 2, in order to realize said method, the invention provides a kind of battery pole piece suppleness proving installation, it comprises 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 mechanical connection, dynamic signal acquisition unit, Dynamic Signal transfer unit 30, data processing unit 40 connect through signal successively.
Dynamic load mechanism comprises mainframe 12, low speed cylinder 14, parallel pressing plate 16 and example platform 18.Wherein, Low speed cylinder 14 is fixed on the top of mainframe 12; Parallel pressing plate 16 is fixed on the bottom of low speed cylinder 14, and example platform 18 is fixed on the bottom of mainframe 12 and is positioned under the parallel pressing plate 16, and low speed cylinder 14, parallel pressing plate 16 and example platform 18 are spatially vertical corresponding.The center line of example platform 18 is provided with rectangle location coral 180 and two magnet 182 that are parallel to platform of two convexities; Offer two rectangular perforation on the fixedly buckle 184 that is exclusively used in fixed cylinder face pole piece 60, fixedly buckle 184 is positioned on the example platform 18 through magnet 182.Top and the rain glass of low speed cylinder 14 is connected, and action is then through accurate voltage regulating valve control, and the parallel pressing plate 16 under it is used for the face of cylinder pole piece 60 on the example platform 18 loaded exerts pressure.
The dynamic signal acquisition unit comprises optical fibre displacement sensor 22 and dynamic load sensor 24.Optical fibre displacement sensor 22 is located on the parallel pressing plate 16, is used to detect parallel pressing plate 16 displacement variable in vertical direction.Dynamic load sensor 24 be located at example platform 18 below, be used to detect the suffered shearing stress in face of cylinder pole piece 60 two ends.
Dynamic Signal transfer unit 30 is electromagnetic signal converters; It is set up electric signal respectively with optical fibre displacement sensor 22, dynamic load sensor 24 and data processing unit 40 and is connected, and can supply signal that data processing unit 40 identifications handle and send it to data processing unit 40 thereby the electromagnetic signal that optical fibre displacement sensor 22, dynamic load sensor 24 collect converted to.
Below will be elaborated to principle of the present invention.
See also Fig. 3, when be fixed on face of cylinder pole piece 60 begin on the example platform 18 test before, face of cylinder pole piece 60 only receives the holding power N of self gravitation mg and example platform in vertical direction
0These two power are equilibrant, just mg=N
0, this moment, example platform 18 following dynamic load sensors 24 can be experienced the pressure F '=N of pole piece to example platform 18
0=mg.During the test beginning, carry out zero clearing, promptly can test the pressure that face of cylinder pole piece 60 increases example platform 18 in the stress and deformation process through the pressure that dynamic load sensor 24 is gathered.
See also Fig. 4, face of cylinder pole piece 60 is the deformation ovalization under the vertical load that parallel pressing plate 16 applies, and it receives the effect of pair of balanced power in vertical direction, promptly downward load F and the holding power N that makes progress.Because oval pole piece 60 is symmetrical structures, get its first half at present and carry out force analysis: as shown in Figure 4, oval in vertical direction pole piece 60 receives load F vertically downward, then receives 2 shearing stress f vertically upward at the transverse two ends.In deformation process; The pressure F ' that dynamic load sensor 24 below the example platform 18 collects and its holding power N to pole piece are a pair of acting force and reacting force; F '=N=F=2f, thus sensor acquisition to power F ' can reflect the shearing stress size that the oval two ends of crooked pole piece receive.Because complicated shearing stress state theoretical solution does not exist, and supposes that at present pole piece is a line elastomer.
Can get by oval girth formula:
dl＝(4du
x-2πdu′)----(1)；
Can get by the Hook law:
Can get by the principle of virtual work:
Fdu′＝k(l-l
0)(4du
x-2πdu′)----(3)；
Can obtain the relational expression of pressure and displacement to (3) by formula (1):
F＝12ku′----(4)；
Wherein, the k=ES/l in the formula (4)
0, E is an elastic modulus, the ability of exosyndrome material opposing elastic strain, and its value is low more, and elastic deformation takes place more easily, explains that suppleness is good more; S is the sectional area of pole piece 60; l
0Be cylinder pole piece 60 initial circumferential length.It is thus clear that, under the fixing situation of pole piece 60 sectional areas and length, pressure F and displacement components u ' ratio be directly proportional i.e.: F/u '～E with the elastic modulus of material.Because F '=N=F=2f, so F '/u '～E that is to say; When fixing deformation takes place 16 times at the parallel pressing plate of imposed load in face of cylinder pole piece 60; F ' value that dynamic load sensor 24 is collected can reflect that the suppleness of pole piece: F ' is big more, explains that the elastic modulus E of reflection pole piece material is just big more, and the ability of its opposing elastic strain is just high more; Just more difficult generation elastic deformation; Be that suppleness is poor more, therefore, the shearing stress f of both sides carried out quantitatively characterizing when F ' can be to face of cylinder pole piece generation deformation.
Because pole piece material is as supporter by foil; Powder and colloid common material with complex that forms after compacting with the surface; Be similar to reinforced concrete structure, the size of the elastic modulus E of its material is relevant with pole piece material (prescription), compacted density, coating weight etc.Because the variable quantity of the pole piece sectional area S that pole piece compacted density, coating weight cause is very little with respect to the variable quantity of pole piece elastic modulus E; Therefore can think that the shearing stress f of pole piece is only relevant with elastic modulus E, thus can the quantitatively characterizing different formulations, the degree of flexibility of the pole piece of compacted density, coating weight.
Material with complex its shearing stress and dependent variable under conditions such as loading speed do not meet linear relation; Be that E is constantly changing in the loading procedure, it is fast more that E increases, and it is strong more to show that material is resisted the ability of elastic strain in loading procedure; Be not easy to take place elastic deformation more, its suppleness is just poor more.Therefore, can utilize the pole piece shearing stress in loading procedure, to judge the degree of flexibility of pole piece with the variation tendency of displacement.
In order to guarantee the accuracy of measurement result, below will analyze and set the major parameter that the present invention is correlated with.
When using the suppleness of battery pole piece suppleness proving installation test battery pole piece 60 of the present invention; Low speed cylinder 14 has the accelerator of 5mm when starting; Travelling speed after the startup should be preferably 0.5mm/s less than 2mm/s, this be for the movement velocity that guarantees parallel pressing plate 16 less than 2mm/s; To prevent, increase the pole piece shearing stress owing to parallel pressing plate 16 speed influence test result soon.The movement velocity of parallel pressing plate 16 sees also table 1 to position stress test result's influence.
The movement velocity of table 1, parallel pressing plate is to position stress test result's the data that influence
Parallel pressing plate 16 is fixed on the bottom of low speed cylinder 14; It is depressed into bottom back and can realizes through the steel ring of installation differing heights between the connecting rod of parallel pressing plate 16 and low speed cylinder 14 with the distance of example platform 18, and conversion steel ring height can be realized distortion that face of cylinder pole piece 60 is carried out in various degree.See also the influence data of the spacing of parallel pressing plate 16 minimum points shown in the table 2 and example platform 18 to test error; In order to guarantee that test error is less than 5%; Parallel pressing plate 16 is depressed into behind the bottom and the spacing of example platform 18 should be in 8-16mm, and the spacing that the subsequent implementation example is used is 13mm.
The spacing of table 2, parallel pressing plate and example platform is to the data that influence of test error
See also battery pole piece size shown in the table 3 and corresponding shearing stress test result thereof, for the pole piece of same widths, pole piece is long more, and the diameter on the face of cylinder of its coiled is just big more.When the face of cylinder of different-diameter receives parallel pressing plate 16 in the power of vertical direction and when certain deformation takes place; It is bigger that deformation takes place the face of cylinder little with respect to diameter, the face of cylinder that diameter is big; Its shearing stress is also bigger; Like the cathode pole piece of 30mm, in the length range from 90mm to 110mm, its shearing stress value increases along with the increase of pole piece length.But along with pole piece length continues to increase, the influence that its coiled face of cylinder receives self gravitation strengthens, and before the pressure at right angle that does not receive parallel pressing plate 16, the face of cylinder of coiled but demonstrates ellipse.Under this state, the shearing stress that oval pole piece has received the processing of making zero when to be tested, the shearing stress value that causes recording at last is lower than the actual value of final deformation, as wide be the pole piece of 30mm, when length was increased to 120mm, its test result reduced on the contrary.Therefore, should guarantee pole piece 60 long enoughs to be tested, guarantee again that tested pole piece 60 ellipse do not occur when reeling and the accuracy that guarantees to test, need the length of the tested pole piece 60 of regulation to guarantee that test result is enough big.According to battery pole piece size shown in the table 3 and corresponding shearing stress test result thereof, the cutting of rectangular cell pole piece is of a size of long 100～110mm and has accurate and stable test result.When the pole piece width is 30～50mm, with the intact fixing wound pole piece of buckle 184 abilities in two holes.
Table 3, battery pole piece size and corresponding shearing stress test result thereof
Below for using characterizing method of the present invention and proving installation to carry out the embodiment that the battery pole piece suppleness is measured.
Be economical with materials, present embodiment uses the battery pole piece of long 100mm, wide 30mm.Apart from being 20mm, two location coral 180 length and width height are respectively 20mm, 3mm, 2mm between two location corals 180 on example platform 18 center lines.Circular magnet 182 is arranged in the two ends of location coral 180 and embeds sample stage 18, and its upper surface is concordant with example platform 18; The two ends of battery pole piece 60 are face of cylinder tangent line with two location corals 180 respectively, and coiled is the face of cylinder of tangent plane with example platform 18.Buckle 184 with two holes is placed on the battery pole piece 182, two holes of buckle 184 respectively with sample stage 18 on two the location corals 180 corresponding, as shown in Figure 2.The magnet 182 at coral 180 two ends, location can hold buckle 184 firmly, thus fixing well battery pole piece 60 to be tested.
After sample is fixing, open the power supply of dynamic load mechanism, and the displacement of data processing unit 40-strength interface.The initiating key of click data processing unit 40 when pressing the dynamic load organization switch; Low speed cylinder 14 promotes the tubular pole piece 60 of parallel pressing plate 16 on example platform 18 and moves; The signal that optical fibre displacement sensor 22, dynamic load sensor 24 will collect respectively in real time passes to Dynamic Signal transfer unit 30; Dynamic Signal transfer unit 30 converts electromagnetic signal to can supply data processing unit 40 identifications to handle signal, and it is passed to data processing unit 40.Data processing unit 40 comes out signal in its displacement-strength interface through handling with graphic presentation, form corresponding data file at last.Data file provides displacement and the shearing stress that every 0.003s gathers, and draws displacement-shearing stress curve, and the maximum shear stress in this deformation process is as the basis for estimation of pole piece suppleness: the pole piece shearing stress is big more, and suppleness is poor more, the easier brittle failure of pole piece.
For lithium battery pole slice; Shearing stress through after the certain deformation of test face of cylinder pole piece 60 generations finds that positive plate is more a lot of greatly than the shearing stress of negative plate, and shearing stress is along with the variation increase trend of pressing plate displacement is more obvious; The elastic modulus that positive plate is described is bigger than the elastic modulus of negative plate; The ability of its elastoresistance deformation is stronger, more difficult generation elastic deformation, and suppleness is also poorer.Also with in bare electric core winding and electric core trimming, positive plate is consistent than the fact that negative plate ruptures more easily for this.
See also Fig. 5, for coating weight, all identical positive plate of prescription kind, record the result and show: along with the pole piece compacted density increases; Pole piece produces fixedly, and the pairing shearing stress of deformation also increases; This explanation compacted density causes the elastic modulus E of pole piece big more more greatly, and the ability of its elastoresistance deformation is strong more, more difficult generation elastic deformation; Then the suppleness of pole piece is just poor more, also fracture more easily.Simultaneously, also can find out, formed in the whole process of oval pole piece by load at face of cylinder pole piece by Fig. 5; Shearing stress also increases with the displacement of pressing plate, and along with the raising of pole piece compacted density, the trend that the pole piece shearing stress increases is just obvious more; Then the trend that in loading procedure, increases of elastic modulus E is obvious more, and the ability of its elastoresistance deformation is strong more, more difficult generation elastic deformation; Then the suppleness of pole piece is just poor more, also fracture more easily.
In sum; The pairing shearing stress in pole piece two ends was big or small when the present invention can measure battery cylindrical face pole piece 60 quantitatively fixedly deformation takes place, the elastic modulus E positive correlation of this power and pole piece 60, and elastic modulus E is the ability of exosyndrome material elastoresistance deformation; The stronger just more difficult generation elastic deformation of ability; Just easier brittle failure, suppleness is just poor more, and the result judges the suppleness degree of pole piece thus.Shearing stress is judged its suppleness with the variation tendency of displacement in the time of simultaneously also can be according to pole piece deformation; Promptly along with the increase of parallel pressing plate displacement, the degree that different pole piece shearing stress increase thereupon, just elastic modulus E is with the increase degree of parallel pressing plate displacement; It is obvious more that E increases; The ability that its elastoresistance deformation is described is strong more, more difficult generation elastic deformation, and suppleness is also poor more.Proving installation of the present invention has good resolution 0.1gf, and the test result of pole piece shearing stress is had good discrimination and reappearance.Proving installation of the present invention simple in structure; All be suitable for for battery positive/negative plate and other coating structure, plastic film; Be particularly useful for having the battery pole piece suppleness test of winding-structure; Test like the suppleness of electrodes of lithium-ion batteries, Ni-MH battery pole piece, nickel-cadmium battery pole piece can be used as the monitoring of different cultivars battery pole piece suppleness, and regulating for the tension force of auto reeling and shaping pressure provides reference; Also can foundation be provided, effectively prevent the brittle failure of pole piece coiling for research and development, the parameters of choice of colding pressing of prescription.
According to the announcement and the instruction of above-mentioned instructions, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should fall in the protection domain of claim of the present invention modifications more of the present invention and change.In addition, although used some specific terms in this instructions, these terms are explanation for ease just, the present invention is not constituted any restriction.
Claims (10)
1. a battery pole piece suppleness characterizing method is characterized in that, may further comprise the 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, the elliptical deformation of evenly being exerted pressure and making it to fix in the face of cylinder with the battery pole piece face of cylinder;
(3) in deformation process, detect the shearing stress and the corresponding displacement at two ends up and down of cylinder pole piece right ends, obtain shearing stress-displacement curve;
(4) analyzing and processing shearing stress-displacement curve draws the suppleness sign amount of battery pole piece.
2. battery pole piece suppleness characterizing method according to claim 1; It is characterized in that the analysis and processing method that adopts in the said step (4) is: the pairing shearing stress of right ends characterizes the suppleness of pole piece when with the said battery pole piece face of cylinder fixedly deformation taking place.
3. battery pole piece suppleness characterizing method according to claim 1 is characterized in that, the analysis and processing method that adopts in the said step (4) is: the suppleness that characterizes pole piece with the average gradient of said shearing stress-displacement curve.
4. according to each described battery pole piece suppleness characterizing method in the claim 1 to 3, it is characterized in that the rectangle pole piece that cutting obtains in the said step (1) is of a size of: width 30-40 millimeter, length 100-110 millimeter.
5. according to each described battery pole piece suppleness characterizing method in the claim 1 to 3, it is characterized in that, is with the speed less than 2mm/s to be exerted pressure in the face of cylinder of pole piece in the said step (2).
6. battery pole piece suppleness proving installation; It is characterized in that; Comprise dynamic load mechanism, dynamic signal acquisition unit, Dynamic Signal transfer unit and data processing unit; Dynamic load mechanism comprises mainframe, low speed cylinder, parallel pressing plate and example platform, and low speed cylinder and example platform are fixed on the mainframe, and pole piece to be tested is fixed on the example platform; Parallel pressing plate is fixed on to be treated the test pole piece and works the effect of exerting pressure that loads on the low speed cylinder; Low speed cylinder, parallel pressing plate and example platform are spatially vertical corresponding, and dynamic signal acquisition unit and dynamic load mechanism mechanical connection, dynamic signal acquisition unit, Dynamic Signal transfer unit, data processing unit connect through signal successively.
7. battery pole piece suppleness proving installation according to claim 6; It is characterized in that; The center line of said example platform is provided with rectangle location coral and two magnet that are parallel to platform of two convexities; A fixed card that is exclusively used in the self-contained battery pole piece is buckled and is offered two rectangular perforation, and fixedly buckle is positioned on the example platform through magnet.
8. battery pole piece suppleness proving installation according to claim 6; It is characterized in that; Said dynamic signal acquisition unit comprises optical fibre displacement sensor and dynamic load sensor, and optical fibre displacement sensor is located on the parallel pressing plate, is used to detect parallel pressing plate displacement variable in vertical direction; The dynamic load sensor be located at example platform below, be used to detect the suffered shearing stress in pole piece two ends, the face of cylinder.
9. battery pole piece suppleness proving installation according to claim 8; It is characterized in that; Said Dynamic Signal transfer unit is an electromagnetic signal converter; It is set up electric signal respectively with optical fibre displacement sensor, dynamic load sensor and data processing unit and is connected; Can with optical fibre displacement sensor, dynamic load sensor acquisition to electromagnetic signal convert to and can supply signal that data processing unit identification handles and send it to data processing unit, data processing unit makes shearing stress-displacement curve to the displacement, the shearing stress signal system that receive from dynamic signal transfer unit.
10. battery pole piece suppleness proving installation according to claim 6 is characterized in that, the spacing that the parallel pressing plate in the said dynamic load mechanism is depressed between back, bottom and the example platform is 8～16 millimeters.
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| CN106018063A (en) * | 2016-05-06 | 2016-10-12 | 清华大学 | Dynamic perforation test device and test piece installation mechanism thereof |
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| CN107290228A (en) * | 2017-06-15 | 2017-10-24 | 力神动力电池系统有限公司 | A kind of electrodes of lithium-ion batteries flexibility detector |
| CN107917845A (en) * | 2017-10-26 | 2018-04-17 | 广东欧珀移动通信有限公司 | The pliability test method of flexible PCB |
| CN108195677A (en) * | 2018-02-01 | 2018-06-22 | 中航锂电（洛阳）有限公司 | A kind of battery pole piece flexibility detection method |
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| CN109894389A (en) * | 2017-12-10 | 2019-06-18 | 深圳格林德能源集团有限公司 | A kind of nickle cobalt lithium manganate positive plate flexibility detection method |
| CN111521483A (en) * | 2020-06-03 | 2020-08-11 | 江西安驰新能源科技有限公司 | Device and method for testing flexibility of lithium battery pole piece |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| KR20090090099A (en) * | 2008-02-20 | 2009-08-25 | 엘에스전선 주식회사 | Device for measuring flexibility |
| 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 |
-
2012
- 2012-04-16 CN CN201210111542.7A patent/CN102620993B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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