CN107946494A - A kind of method for analyzing lithium battery cap cap structure - Google Patents
A kind of method for analyzing lithium battery cap cap structure Download PDFInfo
- Publication number
- CN107946494A CN107946494A CN201711066261.3A CN201711066261A CN107946494A CN 107946494 A CN107946494 A CN 107946494A CN 201711066261 A CN201711066261 A CN 201711066261A CN 107946494 A CN107946494 A CN 107946494A
- Authority
- CN
- China
- Prior art keywords
- block
- lithium battery
- acrylic
- cut
- cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012797 qualification Methods 0.000 claims abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 23
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 244000137852 Petrea volubilis Species 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000012545 processing Methods 0.000 abstract description 5
- 238000002224 dissection Methods 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000013475 authorization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229960002415 trichloroethylene Drugs 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a kind of method for analyzing lithium battery cap cap structure, the lithium battery includes shell and the core in shell, and the shell includes block, the described method comprises the following steps：(1) it is analysed to lithium battery circumferentially to cut off, takes the part comprising block；(2) internal core is removed；(3) cut after embedding is fixed, block is cut vertically；(4) after cut surface is polished flat, it is imaged using Quadratic Finite Element detecting instrument and measures the size at each position of block；(5) size at each position of block is analyzed, is determined as qualification if in the critical field of setting, otherwise to be unqualified.The method of the present invention by being measured after dissection, can intuitively, accurately and rapidly be judged the processing performance and conformity of production of sealing process, be improved the security of lithium battery with in-situ study；Processing procedure can truly reflect block internal structure after sealing, and structure is true and reliable.
Description
Technical field
The present invention relates to lithium battery technical field of quality detection, more particularly to a kind of side for analyzing lithium battery cap cap structure
Method.
Background technology
Lithium battery cap is the component of lithium battery, it plays positive conductive terminal on lithium battery, plays safety-valve
Effect, also provide Cell closure function.Lithium battery cap includes head cover, cushion rubber, explosion-proof diaphragm, aluminium flake/nickel sheet and orifice plate.Top
Lid is installed in the top of cushion rubber.Orifice plate is installed on the bottom of cushion rubber.Aluminium flake/nickel sheet is installed on the middle part of cushion rubber, positioned at head cover and
Between orifice plate.The aluminium flake/explosion-proof diaphragm is equipped between nickel sheet and orifice plate.Orifice plate bottom surface is equipped with pad recess.Installation
When, explosion-proof diaphragm and orifice plate are welded together by laser spot welding in the pad recess of orifice plate, such pad recess meeting
Leave laser solder joint.Laser solder joint is combined closer with pad recess.
Authorization Notice No. is that the Chinese utility model patent of CN203300714U discloses a kind of lithium battery cap, including glue
Circle, orifice plate and explosion-proof diaphragm；The orifice plate is installed on the bottom of the cushion rubber；The explosion-proof diaphragm is installed on described
In cushion rubber and positioned at the inner side of the orifice plate；The bottom surface of the orifice plate is equipped with pad recess；The explosion-proof diaphragm
Welded with pad recess position on orifice plate, have pad in the pad recess；It is characterized in that：The pad
Recess posts film filled with glue or the pad recess；The glue or film is covered in the pad
On.
Authorization Notice No. is that the Chinese utility model patent of CN202695566U discloses a kind of lithium battery cap, its feature
It is：Including head cover, ring-shaped P TC, rupture pressure disc, annular sheet metal, bottom plate and sealing ring with holes, the bottom plate with holes is placed
On the sealing ring, the annular sheet metal, rupture pressure disc, ring-shaped P TC and head cover are sequentially placed on the bottom plate with holes.
With the automation and intelligence of lithium ion battery production technology, application field is also gradually in electric bicycle, electricity
Electrical automobile etc. is commercially available to be widely popularized, this also means that the number of batteries in same Battery pack bag is increasing sharply, by more
Secondary connection in series-parallel reaches required voltage and capacity, to meet the requirement such as specific course continuation mileage.Therefore to lithium ion battery
Production technology and conformity of production put forward the challenge of bigger.
Lithium ion battery is in automatic production process, without personnel's manual operations, from winding, enter completely on transfer matic
Shell is to fluid injection, sealing, and production efficiency is high, and conformity of production is good, but can quickly be examined still without a more perfect method at present
Survey or reflect the combining structure of inside after battery seal.
The content of the invention
The present invention provides a kind of method for analyzing lithium battery cap cap structure, can quickly judge to seal with in-situ study
The processing performance and conformity of production of mouth process, improve the security of lithium battery.
A kind of method for analyzing lithium battery cap cap structure, the lithium battery include shell and the core in shell,
The shell includes block, the described method comprises the following steps：
(1) it is analysed to lithium battery circumferentially to cut off, takes the part comprising block；
(2) internal core is removed；
(3) cut after embedding is fixed, block is cut vertically；
(4) after cut surface is polished flat, it is imaged using Quadratic Finite Element detecting instrument and measures the size at each position of block；
(5) analyze the size at block each position, be determined as qualification if in the critical field of setting, otherwise for
It is unqualified.
In step (1) cutting position be from 5~20mm of block top at.Cutting position is too near then easily to block from block
Structure has an impact, so as to influence the accuracy of testing result；Cutting position is far then unfavorable for subsequent treatment very much from block, enhancing
The workload and difficulty of subsequent treatment.
Cut in step (1) and step (3) using mechanical cutter.
In step (3) embedding fixation is carried out using acrylic.Acrylic (acrylic, acrylic plastics) chemical name is
Polymethyl methacrylate, the transparency is good, does not influence the observation of lithium battery cap notch after embedding, and material is crisp and hard, during cutting
Cut surface is smooth, small on the influence of incision capping structure, ensures the true and reliable of testing result.
When carrying out embedding fixed using acrylic, acrylic solution is first prepared, then immerses sample in acrylic solution,
Cured again.
Acrylic water and acrylic powder in mass ratio 1~3: 1 mix when preparing acrylic solution.Most preferred ratio is
1.5∶1。
Solidification temperature is 35 DEG C~45 DEG C.
Acrylic powder, is commonly called as cold burying resin：AB set meal combining form wherein A be white tiny crystals powder (PMMA, third
Olefin(e) acid resin), B be white or slightly slight blue liquid (acetone, trichloro ethylene and dichloromethane, isocyanates cure
Agent).Resin proportion：Powder 1.2g/cm3；Liquid 1.0g/cm3(at 25 DEG C of room temperature).Main feature：When being retained separately, product
It can stablize, the chemical reaction that will not be individually cured.Chemical curing reaction is produced when both are referred and synthesized together, after curing
Hardness is high so as to ensure the accuracy of embedded sample, while has certain grindability, so that ensure sample scientific research can
Row.Experimental implementation is simple, and without special additional experiments device, grout performance is good, can penetrate into all gaps of sample, with
Ensure that sample occurs without deformation in process of lapping and influences experimental data and the authenticity of figure.Consolidate after curing for white clear
Body, so as to ensure observability of the sample in scientific analysis.
Polished, first polished again with fine sandpaper with coarse sandpaper polishing, coarse sandpaper is using metallographic sander in step (4)
80~120 mesh, fine sandpaper are 1200~1500 mesh.After block cutting, cut surface may be flushed not enough, after the polishing of two steps, be cut
Stomatopod enough flushes, and can truly reflect block internal structure.
The method of the present invention is fixed by again embedding the shell with cap portion after lithium battery is decomposed, and embedding fixation is laggard
Row cutting makes block cut vertically, and cutting is to provide support to capping structure, can ensure cutting after embedding is fixed
During capping structure do not deform, influence result judgement；Polish again after incision, so as to be detected using Quadratic Finite Element
Instrument accurately detects the structure on block section, and the structure on block section has just reacted sealing situation, each relevant portion
If size is not inconsistent standardization, illustrate that sealing is unqualified.The method of the present invention can be with in-situ study, by being measured after dissection, energy
Enough processing performance and conformity of production directly perceived, accurately and rapidly judging sealing process, improve the security of lithium battery；Processing
Process can truly reflect block internal structure after sealing, and structure is true and reliable.
Brief description of the drawings
Fig. 1 is block section structure diagram.
Fig. 2 is the result figure that block section is imaged using Quadratic Finite Element detecting instrument.
Embodiment
Embodiment 1~5
As shown in Figure 1 be lithium battery cap cap structure schematic diagram, including head cover 1, bottom cover 2, box hat 3, PTC thermistor 4,
Explosion-proof valve 5, sealing ring 6 and cage ring 7.After lithium battery dissection in mainly detection Fig. 1 a, b, c and d position everywhere size, altogether
There is the left and right sides, so actual each lithium battery detects 8 data, a places are grown for button, are shoulder height at b, are upper decrement at c, d
Locate as lower decrement.In corresponding diagram 2, size 1 and 5 is size at a, and size 2 and 6 is size at b, and size 3 and 7 is size at c,
Size 4 and 8 is size at d.
Concrete operation step is as follows：
1st, the lithium battery after sealing is being cut off using mechanical cutter at the top of battery cap at following 5~20mm positions,
Take top half (containing block) product stand-by；
2nd, the core of interiors of products is gently taken out with tweezers, is sure not to damage block internal structure；
3rd, at room temperature, it is molten using acrylic water and the configuration acrylic of acrylic powder in mass ratio 1~3: 1 in rubber gauge
Liquid is stand-by；
4th, product is put into rapidly in gauge acrylic solution, and it is rolled twice in acrylic solution so that is sub-
Gram force solution is sufficiently submerged in block in each portion's structure, finally places gauge middle part upwards with block；
5th, the gauge with product is put into 40 DEG C of environment, is cured；
6th, it is to be solidified to finish, it is limited with acrylic solution in hard g., jelly-like；
7th, the product in gauge is taken out, is placed again into mechanical cutter, by product truncation two halves, block is cut vertically
Open；
8th, half block product is removed, first edge is polishing to without crude with 80~120 mesh of coarse sandpaper in metallographic sander,
Again edge clean light is polishing to 1200~1500 mesh of fine sandpaper；
9th, the product after polishing is put under Quadratic Finite Element instrument, after adjusting proper focal length, carries out imaging test closure part
The internal structure parameter of block.
By analyzing the size at each position of block, it is determined as qualification if in the critical field of setting, otherwise
To be unqualified.
The corresponding relevant parameter of specific each embodiment is as shown in table 1.
Table 1
Dimension figure is as shown in table 2 everywhere for the lithium battery detected under each embodiment.
Table 2
Claims (8)
1. a kind of method for analyzing lithium battery cap cap structure, the lithium battery include shell and the core in shell, institute
Stating shell includes block, it is characterised in that the described method comprises the following steps：
(1) it is analysed to lithium battery circumferentially to cut off, takes the part comprising block；
(2) internal core is removed；
(3) cut after embedding is fixed, block is cut vertically；
(4) after cut surface is polished flat, it is imaged using Quadratic Finite Element detecting instrument and measures the size at each position of block；
(5) size at block each position is analyzed, is determined as qualification if in the critical field of setting, otherwise not conform to
Lattice.
2. the method as described in claim 1, it is characterised in that cutting position is from 5~20mm of block top in step (1)
Place.
3. the method as described in claim 1, it is characterised in that carried out in step (1) and step (3) using mechanical cutter
Cutting.
4. the method as described in claim 1, it is characterised in that carry out embedding fixation using acrylic in step (3).
5. method as claimed in claim 4, it is characterised in that when carrying out embedding fixed using acrylic, first prepare acrylic
Solution, then immerses sample in acrylic solution, then is cured.
6. method as claimed in claim 5, it is characterised in that acrylic water and acrylic powder press matter when preparing acrylic solution
Amount is than 1~3: 1 mixing.
7. method as claimed in claim 5, it is characterised in that solidification temperature is 35 DEG C~45 DEG C.
8. the method as described in claim 1, it is characterised in that polished in step (4) using metallographic sander, first with thick
Sand paper polishing is polished with fine sandpaper again, and coarse sandpaper is 80~120 mesh, and fine sandpaper is 1200~1500 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711066261.3A CN107946494A (en) | 2017-11-02 | 2017-11-02 | A kind of method for analyzing lithium battery cap cap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711066261.3A CN107946494A (en) | 2017-11-02 | 2017-11-02 | A kind of method for analyzing lithium battery cap cap structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107946494A true CN107946494A (en) | 2018-04-20 |
Family
ID=61934210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711066261.3A Pending CN107946494A (en) | 2017-11-02 | 2017-11-02 | A kind of method for analyzing lithium battery cap cap structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107946494A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737867A (en) * | 2018-11-22 | 2019-05-10 | 合肥国轩高科动力能源有限公司 | A method of observation battery core internal structure |
| CN111103285A (en) * | 2019-11-28 | 2020-05-05 | 荆门亿纬创能锂电池有限公司 | Battery sealing detection method |
| CN113218760A (en) * | 2021-05-12 | 2021-08-06 | 江西迪比科股份有限公司 | Method for testing tension of welding spot of power cap of edge covering structure |
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| CN109737867A (en) * | 2018-11-22 | 2019-05-10 | 合肥国轩高科动力能源有限公司 | A method of observation battery core internal structure |
| CN111103285A (en) * | 2019-11-28 | 2020-05-05 | 荆门亿纬创能锂电池有限公司 | Battery sealing detection method |
| CN113218760A (en) * | 2021-05-12 | 2021-08-06 | 江西迪比科股份有限公司 | Method for testing tension of welding spot of power cap of edge covering structure |
| CN113218760B (en) * | 2021-05-12 | 2024-05-31 | 江西迪比科股份有限公司 | Welding spot tension test method for power cap of edge-covering structure |
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Address after: 313100, No. 18, Qiao Qiao Road, Changxing County painting industrial park, Zhejiang, Huzhou Applicant after: Tianneng Shuai Fude Energy Co., Ltd Address before: 313100, No. 18, Qiao Qiao Road, Changxing County painting industrial park, Zhejiang, Huzhou Applicant before: Zhejiang energy energy Polytron Technologies Inc |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |
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| RJ01 | Rejection of invention patent application after publication |