CN109443947A - A kind of electrodes of lithium-ion batteries flexibility detection device and its test method - Google Patents
A kind of electrodes of lithium-ion batteries flexibility detection device and its test method Download PDFInfo
- Publication number
- CN109443947A CN109443947A CN201811199776.5A CN201811199776A CN109443947A CN 109443947 A CN109443947 A CN 109443947A CN 201811199776 A CN201811199776 A CN 201811199776A CN 109443947 A CN109443947 A CN 109443947A
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- Prior art keywords
- pole piece
- flexibility
- clamping plate
- lithium
- crackle
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
Abstract
The present invention relates to lithium ion battery detection fields, more particularly to a kind of flexible detection device of li-ion electrode pole piece and its detection method, including pedestal (1) and it is respectively and vertically fixed at two vertical plates (2) at the pedestal (1) both ends, volume needle (3) is installed between two vertical plates (2), the pole piece (4) that need to be tested is hung on the volume needle (3), there is clamping plate (5) clamping under the pole piece (4), counterweight (7) are hung under the clamping plate (5) pole piece (4) to be straightened；Apparatus of the present invention simultaneously cooperate high magnification microscope to observe whether pole coating occurs fracture or crackle size, and then solve the problems, such as to be difficult to when the detection of current pole piece flexibility quantitative.
Description
Technical field
The present invention relates to lithium ion battery detection fields, and in particular to a kind of electrodes of lithium-ion batteries flexibility detection device
And its test method.
Background technique
The pole piece of lithium ion battery is on metal foil made of coating slurry.Usually in copper foil surface coating cathode slurry
Material applies anode sizing agent in aluminium foil surface.Nowadays material category is numerous, is formulated even more ever-changing, pole piece flexibility obtained
It is most important for subsequent rolling step.The pole piece of flexibility difference will affect postorder winding process, cause the peaces such as crackle, leakage foil
Full potential problem.So the detection of pole piece flexibility is of great importance for lithium ion battery research and development and production.
In the prior art, for the flexibility detection method of electrodes of lithium-ion batteries mainly using extruding bending mode.This
Defect existing for kind method has: pole piece bending angle difference, curvature difference, unbalance stress, reproducibility are poor.
Summary of the invention
It is flexible to propose a kind of electrodes of lithium-ion batteries for the problems in above-mentioned background technique of effective solution by the present invention
Property detection device and its test method, specific technical solution are as follows；
A kind of electrodes of lithium-ion batteries flexibility detection device, including pedestal (1) and it is respectively and vertically fixed at the pedestal
(1) two vertical plates (2) at both ends, which is characterized in that volume needle (3), the volume needle are equipped between two vertical plates (2)
(3) pole piece (4) that need to be tested is hung on, there is clamping plate (5) clamping under the pole piece (4), counterweight (7) are hung under the clamping plate (5) and are used
Pole piece (4) to be straightened.
Preferably, the clamping plate (5) is locked with lock screw (6).
Preferably, the replaceable different-diameter of the volume needle (3) is bonded curvature of the analog roll in.
A kind of detection method using electrodes of lithium-ion batteries flexibility detection device
Its detecting step is as follows:
Pole piece to be detected (4) is laid in volume needle (3) by step 1., and both ends naturally droop and clamped with clamping plate (5)；
Step 2. is locked clamping plate (5) with lock screw (6)；
Step 3. hangs counterweight (7) on clamping plate (5), and hand steered counterweight (7) is slowly drop down to pole piece (4) and is straightened；
The crackle size and state of step 4. use ultramicroscopic observation pole piece (4) crooked position on volume needle (3)；
Under the premise of step 5. is not cracked according to pole piece, needle is rolled up by workable minimum diameter and judges the soft of pole piece
Toughness.
According to pole piece under the premise of not cracking, workable most rouleau needle diameter phi judges that pole piece flexibility is excellent
Bad, judgment step is as follows:
As 2.5≤φ≤3.5mm, pole piece is not cracked, and flexibility is best, is the first estate；
As 3.5 < φ≤4.5mm, pole piece is not cracked, but has crackle in φ=3.5mm, and flexibility is slightly worse,
For the second grade；
As 4.5 < φ≤5.5mm, pole piece is not cracked, but has crackle in φ=4.5mm, and flexibility is poor,
For the tertiary gradient；
As 5.5 < φ≤6mm, pole piece is not cracked, but has crackle in φ=5.5mm, and flexibility is very poor, is
The fourth estate；
There is crackle as φ=6mm, flexibility is worst, is the 5th grade.
The beneficial effects of the present invention are (1) apparatus of the present invention simultaneously cooperate high magnification microscope to be to observe pole coating
No generation fracture or crackle size, and then solve the problems, such as to be difficult to when the detection of current pole piece flexibility quantitative；(2) present invention dress
Operation precision height is set, favorable reproducibility, disturbing factor is few, it can be ensured that pole piece curved amount of curvature when detection every time；(3) in addition
Test method of the invention is easy to operate, and the flexibility data science measured is reliable, is suitble to the pole piece of different materials different formulations
Comparison between flexibility is also suitble to play the problem of being likely encountered a kind of pole piece flexibility of formula in postorder assembly
Warning function is suitable for research and development exploitation new process and production technology quality testing.
Detailed description of the invention
Fig. 1 is structure of the detecting device schematic diagram of the present invention；
Fig. 2 is detection device operation schematic diagram of the present invention.
In figure: 1- pedestal；2- vertical plate；3- volumes of needle；4- pole piece；5- clamping plate；6- lock screw；7- counterweight
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment；
As shown in Figure 1, a kind of flexible detection device of electrodes of lithium-ion batteries, including it is respectively and vertically fixed at pedestal
(1) two vertical plates (2) at both ends are located between two vertical plates (2) and are installed with volume needle (3).
Further scheme is located on two clamping plates (5) and is connected with lock screw (6).
Further scheme hangs with counterweight (7) under the clamping plate (5).
Further scheme, the volume needle (3) can be replaced into different-diameter model.
Further scheme, the counterweight (7) can be replaced into different quality model, can also gradually increase weight.
Its detection process is as follows:
Step 1. by pole piece 4 to be detected be laid in volume needle 3 on, the downward lowering in both ends is simultaneously clamped with clamping plate 5, then with lock
6 locking plate 5 of screw；
Step 2. hangs over counterweight 7 on clamping plate 5, and hand steered counterweight 7 is slowly drop down to pole piece 4 and is straightened, so that pole piece 4 is close to volume
Needle 3 is bent more than 180 °；
Step 3. is tightly attached to volume 3 upper bit crackle size of needle and state using ultramicroscopic observation pole piece 4；
According to pole piece, workable minimum diameter under the premise of not cracking rolls up needle φ to step 4., judges that pole piece is flexible
Property superiority and inferiority:
As 2.5≤φ≤3.5mm, pole piece is not cracked, and flexibility is best, is the first estate；
As 3.5 < φ≤4.5mm, pole piece is not cracked, but has crackle in φ=3.5mm, and flexibility is slightly worse,
For the second grade；
As 4.5 < φ≤5.5mm, pole piece is not cracked, but has crackle in φ=4.5mm, and flexibility is poor,
For the tertiary gradient；
As 5.5 < φ≤6mm, pole piece is not cracked, but has crackle in φ=5.5mm, and flexibility is very poor, is
The fourth estate；
There is crackle as φ=6mm, flexibility is worst, is the 5th grade.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as the protection scope of invention.
Claims (5)
1. a kind of electrodes of lithium-ion batteries flexibility detection device, including pedestal (1) and it is respectively and vertically fixed at the pedestal (1)
Two vertical plates (2) at both ends, which is characterized in that be equipped between two vertical plates (2) and roll up needle (3), on the volume needle (3)
The pole piece (4) that need to be tested is hung with, there is clamping plate (5) clamping under the pole piece (4), counterweight (7) are hung under the clamping plate (5) to by pole
Piece (4) is straightened.
2. electrodes of lithium-ion batteries flexibility detection device according to claim 1, it is characterised in that: the clamping plate (5)
It is locked with lock screw (6).
3. electrodes of lithium-ion batteries flexibility detection device according to claim 1, it is characterised in that: the volume needle (3) can
Different-diameter is replaced, to convert curvature of the fitting analog roll in.
4. a kind of detection method using claim 1, which is characterized in that detecting step is as follows:
Pole piece to be detected (4) is laid in volume needle (3) by step 1., and both ends naturally droop and clamped with clamping plate (5)；
Step 2. is locked clamping plate (5) with lock screw (6)；
Step 3. hangs counterweight (7) on clamping plate (5), and hand steered counterweight (7) is slowly drop down to pole piece (4) and is straightened；
The crackle size and state of step 4. use ultramicroscopic observation pole piece (4) crooked position on volume needle (3)；
Under the premise of step 5. is not cracked according to pole piece, needle is rolled up by workable minimum diameter and judges the flexible of pole piece
Property.
5. the detection method according to claim 4 using electrodes of lithium-ion batteries flexibility detection device, feature exist
In: according to pole piece under the premise of not cracking, workable most rouleau needle diameter phi judges pole piece flexibility superiority and inferiority, sentences
It is disconnected that steps are as follows:
As 2.5≤φ≤3.5mm, pole piece is not cracked, and flexibility is best, is the first estate；
As 3.5 < φ≤4.5mm, pole piece is not cracked, but has crackle in φ=3.5mm, and flexibility is slightly worse, is the
Two grades；
As 4.5 < φ≤5.5mm, pole piece is not cracked, but has crackle in φ=4.5mm, and flexibility is poor, is the
Three grades；
As 5.5 < φ≤6mm, pole piece is not cracked, but has crackle in φ=5.5mm, and flexibility is very poor, is the 4th
Grade；
There is crackle as φ=6mm, flexibility is worst, is the 5th grade.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018108563582 | 2018-07-31 | ||
| CN201810856358 | 2018-07-31 |
Publications (1)
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|---|---|
| CN109443947A true CN109443947A (en) | 2019-03-08 |
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ID=65545385
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| CN201811199776.5A Pending CN109443947A (en) | 2018-07-31 | 2018-10-16 | A kind of electrodes of lithium-ion batteries flexibility detection device and its test method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018118A (en) * | 2019-03-30 | 2019-07-16 | 苏州宇量电池有限公司 | A kind of adhesion testing device and method of electrodes of lithium-ion batteries |
| CN110455642A (en) * | 2019-08-26 | 2019-11-15 | 芜湖天弋能源科技有限公司 | A kind of battery pole piece flexibility test fixture and test method |
| CN113237828A (en) * | 2020-07-13 | 2021-08-10 | 江苏春兰清洁能源研究院有限公司 | Method for detecting flexibility of lithium ion battery pole piece |
| CN116183380A (en) * | 2023-04-27 | 2023-05-30 | 宁德时代新能源科技股份有限公司 | Method, device, equipment and medium for detecting flexibility of battery pole piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113237828A (en) * | 2020-07-13 | 2021-08-10 | 江苏春兰清洁能源研究院有限公司 | Method for detecting flexibility of lithium ion battery pole piece |
| CN116183380A (en) * | 2023-04-27 | 2023-05-30 | 宁德时代新能源科技股份有限公司 | Method, device, equipment and medium for detecting flexibility of battery pole piece |
| CN116183380B (en) * | 2023-04-27 | 2024-02-23 | 宁德时代新能源科技股份有限公司 | Method, device, equipment and medium for detecting flexibility of battery pole piece |
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