CN107068946A - One kind manufacture UHMWPE lithium battery diaphragm die devices - Google Patents
One kind manufacture UHMWPE lithium battery diaphragm die devices Download PDFInfo
- Publication number
- CN107068946A CN107068946A CN201710268045.0A CN201710268045A CN107068946A CN 107068946 A CN107068946 A CN 107068946A CN 201710268045 A CN201710268045 A CN 201710268045A CN 107068946 A CN107068946 A CN 107068946A
- Authority
- CN
- China
- Prior art keywords
- sheath
- push
- down head
- lithium battery
- seaming chuck
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
-
- 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
Abstract
The present invention discloses a kind of manufacture UHMWPE lithium battery diaphragm die devices, and the die device global design is cube shaped, specifically includes base, sheath, push-down head, seaming chuck, two pieces of removable shims.Wherein base is designed as designing two column type cavitys in " convex " shape, sheath and two necks are designed in upper surface, and corresponding seaming chuck connects two compression legs, and seaming chuck compression leg diameter is less than push-down head diameter, and poly tetrafluoroethylene is sprayed with push-down head contact surface.The push-down head upper surface sprays polytetrafluoroethylene (PTFE).Pressure head diameter is different above and below this device and is conducive to lithium battery diaphragm to be stripped from polytetrafluoroethylmaterial material spraying, and this greatly improves the integrity degree of shaping diaphragm, also improves yield rate.Double compression leg designs can press two pieces of barrier films simultaneously, and this design significantly improves production efficiency.
Description
Technical field
It is specifically a kind of manufacture UHMWPE lithium battery diaphragm die devices the present invention relates to machining technology field.
Background technology
Current laboratory research UHMWPE lithium battery diaphragms, ultra-high molecular weight polyethylene（ultra high molecular
Weight polyethylene abbreviations UHMWPE）, it is compression molding to commonly use forming method, and mould therefor is generally two pieces of iron plates,
To keep the barrier film cleanliness factor often shimming between iron plate up and down.Conventional gasket material is generally polytetrafluoroethylene (PTFE), polyimides.
That is, iron plate preheats, and on the iron plate that pad is laid in load sample product, is put into a certain amount of sample；Then covered respectively on sample
Pad and iron plate, carry out hot-forming, cold moudling respectively.Finally from de- pad, the demoulding.
Wherein to be not susceptible to thermal deformation, i.e. high high-temp stability good for polyimides, during compression molding, is conducive to lithium electricity
Pond diaphragm forming, but easily it is bonded with lithium battery diaphragm, causes barrier film demoulding difficult, and polytetrafluoroethylene (PTFE) can be avoided and every
Film is bonded, but poor as the thin film high temperature heat endurance of pad.Therefore at present with compression molding method manufacture lithium battery every
Film, mould is simple and crude, cumbersome, and pad is difficult to select, and the process-cycle is long, and efficiency is low, and that seriously hinders lithium battery diaphragm enters one
Step research.
The content of the invention
In consideration of it, it is an object of the invention to provide a kind of mould for needed for lithium battery diaphragm compression molding, being easy to protect
Demonstrate,prove barrier film yield rate and production efficiency.The die device, base is laid flat, and is coordinated sheath and is put into down in sheath cylindrical cavity
Pressure head, a certain amount of sample is positioned on push-down head, and two pieces of pads are put into the neck on sheath both sides respectively, by seaming chuck compression leg
Cooperation is put in sheath cavity, and then package unit is put into moulding press carries out hot pressing, cold pressing respectively.When taking film, by base and
Removable shim is removed, and in moulding press, push-down head is ejected, and sample ora terminalis is clamped with tweezers, the slow demoulding.
The object of the present invention is achieved like this, a kind of described manufacture UHMWPE lithium battery diaphragm mould molding devices,
Including base, sheath, push-down head, seaming chuck, removable shim, it is characterised in that mold base is designed as " convex " shape, four angles
It is respectively equipped with spring groove, spring groove and is each fitted with spring, " recessed " that overwrap designs can coordinate into the mold base with " convex " shape
The sheath of shape, sheath is provided with cylindrical cavity, and the whole chromium plating of the inwall of cylindrical cavity ensure precision, spring top can withstand on
On the sheath bottom that mold base coordinates；Push-down head bottom is provided with cylinder, can be embedded into the cylinder that the medium design of sheath has
The bottom of shape cavity, the upper surface spraying polytetrafluoroethylene (PTFE) of push-down head, is easy to lithium battery diaphragm to be stripped with push-down head；Pad is distinguished
It is placed in the groove that sheath upper surface both sides are respectively provided with, and pad top has and exposed on groove, exposes the pad on groove
Highly it is that two compression legs are designed with below lithium battery diaphragm thickness, seaming chuck, the compression leg diameter of seaming chuck is less than push-down head diameter,
Top plate, chrome-faced are connected with above seaming chuck；Two compression legs below sheath, seaming chuck are coordinated to put in circle vertically seaming chuck
In cylindrical cavity, the sample being located on push-down head being put in the cylindrical cavity of sheath can be molded, and ensure top
Plate level.
Three-six cylindrical cavities are designed with above-mentioned sheath.
Above-mentioned two pieces dismountable pads are, for controlling film thickness, can be accurate to 1 μm.
The making UHMWPE lithium battery diaphragms of manufacture UHMWPE lithium battery diaphragm mould molding devices of the present invention
Method, comprises the following steps：
（1）Mold base is designed as " convex " shape, and four angles are respectively provided with 15 × 15mm spring；
（2）Design the sheath that bottom is " recessed " shape, intermediate fabrication d1=65mm, h1=20.02 ± 0.001mm cylindrical cavity,
The whole chromium plating of the inwall of cylindrical cavity ensure precision, and mold base is kept steady, and sheath is coordinated and is put into above mold base；
（3）Push-down head is d3=64 ± 0.01mm, h3=10mm cylinder, the upper surface spraying polytetrafluoroethylene (PTFE) of push-down head, just
It is stripped in lithium battery diaphragm and push-down head；Push-down head is put into the cylindrical cavity of sheath, a certain amount of sample is put into circle
Above push-down head in cylindrical cavity；
For control UHMWPE lithium battery diaphragm thickness, design removable shim is 120 × 10 × 5mm, is individually fixed on sheath
Surface both sides；Seaming chuck coordinates sheath, is designed as two compression legs, and compression leg size is d2=63mm, h2Connected on=13mm, seaming chuck
There are top plate, chrome-faced；Seaming chuck is coordinated in sheath, compression leg puts in cylindrical cavity vertically, it is ensured that top plate level；
（4）Above-mentioned steps will be passed through（1）- step（3）The whole set of die device of acquisition is put into moulding press, carries out compression molding
Processing, pressure be 10MPa, temperature be 200 DEG C under conditions of, precompressed 3min, hot pressing 5min；Again by whole set of die device level
It is put into moulding press cold pressing plate, pressurize 10min；
（5）After compression molding processing, mold base is taken away, after the pad of jacket surface is extracted out, remaining device is put in molding
Machine is cold-pressed platform, applies certain pressure to push-down head break away from moulds；
（6）Sample thin film ora terminalis is pressed from both sides with tweezers, is slowly taken out sample thin film, two pieces of UHMWPE lithium battery diaphragm processing and formings are complete
Into.
Specifically, UHMWPE lithium battery diaphragm compression molding die devices of the invention, including base, push-down head, shield
Set, seaming chuck.The overwrap designs have two column type cavitys, for putting down pressure head and sample；Seaming chuck is matched, is designed with
Two compression legs with diameter, for pressure-like product.When sample by the power of seaming chuck and heat act on, to edge flowing film forming, under
The diameter of pressure head is slightly larger than seaming chuck, therefore, is pushing head edge, the effect that sample does not stress, volume increase forms ora terminalis,
It is easy to demoulding, it is ensured that yield rate.
In the present invention, seaming chuck, push head surface selection spraying polytetrafluoroethylmaterial material.Compared to steel, polytetrafluoroethyl-ne
Alkene material high temperature resistant --- using operating temperature up to 250 DEG C, high lubrication --- is coefficient of friction the lowest in solid material, not glued
It is attached --- it is minimum surface tension in solid material, any material is not adhered to, its coefficient of friction of mechanical property is minimum, is only
The 1/5 of polyethylene, therefore select this material as push-down head and be sprayed at seaming chuck surface, it is easy to the demoulding, it is ensured that UHMWPE lithiums electricity
Pond membrane integrity and film thickness uniformity.Therefore, the present invention advantageously accounts for the problem of lithium battery diaphragm yield rate is low.
In the present invention, the design of double compression legs can press two pieces of lithium battery diaphragms simultaneously, compared to in existing production one secondary mould
Tool can only manufacture one piece of barrier film, and production efficiency is significantly improved.Therefore the present invention solves for lithium battery diaphragm compression molding processing
Critical problem, improves yield rate, and production efficiency reduces production cost.
Brief description of the drawings
Fig. 1 is the elevation cross-sectional view of apparatus of the present invention.
Fig. 2 is the top view of apparatus of the present invention.
Fig. 3 is the A-A step profile figures of apparatus of the present invention.
Embodiment
The following examples can make professional and technical personnel that the present invention is more fully understood, but therefore not send out this
It is bright to be limited among described scope of embodiments.
Embodiment 1
Such as Fig. 1, Fig. 2, shown in Fig. 3, the present invention includes：Mold base 1, sheath 2, push-down head 3, seaming chuck 4, pad 5, spring 6,
Top plate 7, its design feature is that mold base 1 is designed as " convex " shape, and four angles are respectively equipped with spring groove and are each fitted with 15 × 15mm
Spring 6, sheath 2 is designed to the sheath 2 of " recessed " shape that can coordinate with the mold base 1 of " convex " shape, and the intermediate fabrication of sheath 2 has
d1=65mm, h1=20.02 ± 0.001mm cylindrical cavity, the whole chromium plating of inwall of cylindrical cavity ensure precision, cylinder
Cavity is that, the bottom of through to, the top of spring 6 can be withstood on the bottom of sheath 2 coordinated with mold base 1；Push-down head 3 is d3=64±
0.01mm, h3=10mm cylinder, can be embedded into the bottom for the cylindrical cavity that the medium design of sheath 2 has, push-down head it is upper
Surface can spray polytetrafluoroethylene (PTFE), be easy to lithium battery diaphragm to be stripped with push-down head, to control UHMWPE lithium battery diaphragm thickness,
The present invention designs removable shim 5 for 120 × 10 × 5mm, and in the groove for being respectively placed in the upper surface both sides of sheath 2, groove has side
Opening is easy to pad 5 to take out, so be removable shim, and pad 5 has and exposes part on groove, exposes the pad on groove
The height of piece 5 is lithium battery diaphragm thickness, and seaming chuck 4 is designed with two compression legs, each compression leg d below2=63mm, h2=13mm, upper pressure
First 4 connect top plate 7, chrome-faced above.Two compression legs below sheath 2, seaming chuck 4 are coordinated to put in circle vertically seaming chuck 4
In cylindrical cavity, the sample being located on push-down head 3 being put in the cylindrical cavity of sheath 2 can be molded, and ensure
The level of top plate 7.
The seaming chuck compression leg diameter of the present invention is less than push-down head diameter, and poly tetrafluoroethylene is sprayed with push-down head contact surface.
The push-down head upper surface sprays polytetrafluoroethylene (PTFE).Pressure head diameter is different above and below this device and is sprayed from polytetrafluoroethylmaterial material
Lithium battery diaphragm is conducive to be stripped, this greatly improves the integrity degree of shaping diaphragm, also improves yield rate.Double compression leg designs
Two pieces of barrier films can be pressed simultaneously, and this design significantly improves production efficiency.
Embodiment 2
Such as Fig. 1, Fig. 2, shown in Fig. 3, the present embodiment UHMWPE lithium battery diaphragm molding die device preparation methods, the preparation method
Comprise the following steps that：
（1）As shown in figure 1, mold base 1 is designed as " convex " shape, four angles are respectively provided with 15 × 15mm spring 6.
Mating mold base 1, design bottom is the sheath 2 of " recessed " shape, intermediate fabrication d1=65mm, h1=20.02±
0.001mm cylindrical cavity, the whole chromium plating of inwall of cylindrical cavity ensure precision, and mold base 1 is kept steady, by sheath 2
Cooperation is put into above mold base.
（2）Push-down head 3 is d3=64 ± 0.01mm, h3=10mm cylinder, the upper surface spraying polytetrafluoroethyl-ne of push-down head
Alkene, is easy to be stripped in lithium battery diaphragm and push-down head.In the cylindrical cavity for putting it into sheath 2, a certain amount of sample is put
Enter in cylindrical cavity.
（3）For control UHMWPE lithium battery diaphragm thickness, present invention design removable shim 5 is 120 × 10 × 5mm, point
The upper surface both sides of sheath 2 are not fixed on.
Seaming chuck 4 coordinates sheath 2, is designed as two compression legs, d2=63mm, h2=13mm, is easy to form lithium battery diaphragm end
Edge, connects top plate 7, chrome-faced.Seaming chuck 4 is coordinated into sheath 2, compression leg puts in cylindrical cavity vertically, it is ensured that the water of top plate 7
It is flat.
（4）By embodiment 1 is obtained or step（1）-（3）Obtained whole set of die device is put into moulding press, carries out mould
Molded processing, pressure be 10MPa, temperature be 200 DEG C under conditions of, precompressed 3min, hot pressing 5min；Again by package unit water
Keep flat into moulding press cold pressing plate, pressurize 10min.
（5）After compression molding processing, mold base 1 is taken away, after the pad 5 on the surface of sheath 2 is extracted out, remaining device put
Platform is cold-pressed in moulding press, applies certain pressure to the break away from moulds of push-down head 3.
（6）Sample ora terminalis is pressed from both sides with tweezers, slowly sample thin film is taken out.Two pieces of UHMWPE lithium battery diaphragm processing and formings are complete
Into.
Above-mentioned embodiment is the further description to the present patent application, but the claims in the present invention are protected
Scope be not limited to scope described in embodiment, all technical schemes using with effect deformation etc. all fall within this hair
Bright scope of the claims.
Claims (4)
1. one kind manufacture UHMWPE lithium battery diaphragm mould molding devices, including it is base, sheath, push-down head, seaming chuck, detachable
Pad, it is characterised in that mold base is designed as " convex " shape, four angles, which are respectively equipped with spring groove, spring groove, is each fitted with bullet
Spring, the sheath of " recessed " shape that overwrap designs can coordinate into the mold base with " convex " shape, sheath is provided with cylindrical cavity, cylinder
The whole chromium plating of the inwall of cavity ensure precision, and spring top can be withstood on the sheath bottom coordinated with mold base；Push-down head bottom
Portion is provided with cylinder, can be embedded into the bottom for the cylindrical cavity that the medium design of sheath has, and the upper surface spraying of push-down head is poly-
Tetrafluoroethene, is easy to lithium battery diaphragm to be stripped with push-down head；Pad is respectively placed in the groove that sheath upper surface both sides are respectively provided with,
And pad top has and exposed on groove, it is to be set below lithium battery diaphragm thickness, seaming chuck to expose the spacer height on groove
In respect of two compression legs, the compression leg diameter of seaming chuck, which is less than above push-down head diameter, seaming chuck, is connected with top plate, chrome-faced；Will
Seaming chuck coordinates sheath, and two compression legs can be put in cylindrical cavity vertically below seaming chuck, can be to being put in the cylinder of sheath
The sample being located on push-down head in cavity is molded, and ensures top plate level.
2. mould molding device as claimed in claim 1, it is characterised in that three-six cylindrical cavities are designed with sheath.
3. mould molding device as claimed in claim 1 or 2, it is characterised in that two pieces of dismountable pads are thin for controlling
Film thickness, can be accurate to 1 μm.
4. a kind of making UHMWPE lithiums of any described manufacture UHMWPE lithium battery diaphragm mould molding devices of claim 1-3
The method of battery diaphragm, comprises the following steps：
（1）Mold base is designed as " convex " shape, and four angles are respectively provided with 15 × 15mm spring；
（2）Design the sheath that bottom is " recessed " shape, intermediate fabrication d1=65mm, h1=20.02 ± 0.001mm cylindrical cavity, circle
The whole chromium plating of the inwall of cylindrical cavity ensure precision, and mold base is kept steady, and sheath is coordinated and is put into above mold base；
（3）Push-down head is d3=64 ± 0.01mm, h3=10mm cylinder, the upper surface spraying polytetrafluoroethylene (PTFE) of push-down head, is easy to
Lithium battery diaphragm is stripped with push-down head；Push-down head is put into the cylindrical cavity of sheath, a certain amount of sample is put into cylinder
Above push-down head in shape cavity；
For control UHMWPE lithium battery diaphragm thickness, design removable shim is 120 × 10 × 5mm, is individually fixed on sheath
Surface both sides；Seaming chuck coordinates sheath, is designed as two compression legs, and compression leg size is d2=63mm, h2Connected on=13mm, seaming chuck
There are top plate, chrome-faced；Seaming chuck is coordinated in sheath, compression leg puts in cylindrical cavity vertically, it is ensured that top plate level；
（4）Step will be passed through（1）- step（3）The whole set of die device of acquisition is put into moulding press, carries out compression molding processing,
Pressure be 10MPa, temperature be 200 DEG C under conditions of, precompressed 3min, hot pressing 5min；Whole set of die device level is put into again
Moulding press cold pressing plate, pressurize 10min；
（5）After compression molding processing, mold base is taken away, after the pad of jacket surface is extracted out, remaining device is put in molding
Machine is cold-pressed platform, applies certain pressure to push-down head break away from moulds；
（6）Sample thin film ora terminalis is pressed from both sides with tweezers, is slowly taken out sample thin film, two pieces of UHMWPE lithium battery diaphragm processing and formings are complete
Into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710268045.0A CN107068946B (en) | 2017-04-22 | 2017-04-22 | Mould device for manufacturing UHMWPE lithium battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710268045.0A CN107068946B (en) | 2017-04-22 | 2017-04-22 | Mould device for manufacturing UHMWPE lithium battery diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107068946A true CN107068946A (en) | 2017-08-18 |
| CN107068946B CN107068946B (en) | 2019-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710268045.0A Active CN107068946B (en) | 2017-04-22 | 2017-04-22 | Mould device for manufacturing UHMWPE lithium battery diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107068946B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5321274A (en) * | 1976-08-11 | 1978-02-27 | Seiko Instr & Electronics | Struture of electric poles of high frequency wave welder |
| EP1118442A2 (en) * | 2000-01-20 | 2001-07-25 | Nisshinbo Industries, Inc. | Mold for producing fuel cell separator |
| CN203831540U (en) * | 2014-04-30 | 2014-09-17 | 郑州磨料磨具磨削研究所有限公司 | Bidirectional pressing forming mould used for unidirectional press |
-
2017
- 2017-04-22 CN CN201710268045.0A patent/CN107068946B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5321274A (en) * | 1976-08-11 | 1978-02-27 | Seiko Instr & Electronics | Struture of electric poles of high frequency wave welder |
| EP1118442A2 (en) * | 2000-01-20 | 2001-07-25 | Nisshinbo Industries, Inc. | Mold for producing fuel cell separator |
| CN203831540U (en) * | 2014-04-30 | 2014-09-17 | 郑州磨料磨具磨削研究所有限公司 | Bidirectional pressing forming mould used for unidirectional press |
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| Publication number | Publication date |
|---|---|
| CN107068946B (en) | 2019-12-13 |
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Inventor after: Qian Qingrong Inventor after: Xiao Liren Inventor after: Jiang Wei Inventor after: Chen Yilan Inventor after: Lin Yu Inventor after: Huang Baoquan Inventor after: Chen Qinghua Inventor after: Zeng Lingxing Inventor after: Xue Hui Inventor after: Liu Xinping Inventor before: Qian Qingrong Inventor before: Jiang Wei Inventor before: Lin Yu Inventor before: Huang Baoquan Inventor before: Chen Qinghua Inventor before: Zeng Lingxing Inventor before: Xue Hui Inventor before: Liu Xinping Inventor before: Xiao Liren |
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