CN107919455A - Battery and its lug, the battery modules using the battery - Google Patents
Battery and its lug, the battery modules using the battery Download PDFInfo
- Publication number
- CN107919455A CN107919455A CN201711270583.XA CN201711270583A CN107919455A CN 107919455 A CN107919455 A CN 107919455A CN 201711270583 A CN201711270583 A CN 201711270583A CN 107919455 A CN107919455 A CN 107919455A
- Authority
- CN
- China
- Prior art keywords
- battery
- clamping piece
- lug
- exposed collector
- present
- 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.)
- Withdrawn
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses battery and its lug, the battery modules using the battery, belong to battery technology field.Battery includes battery core and lug, pole piece is equipped with battery core, pole piece is equipped with exposed collector, the lug includes body, the clamping piece for clamping exposed collector is welded with body, clamping piece is welded and fixed with exposed collector, is welded by the way that exposed collector is installed between clamping piece, reduce exposed collector and cut process, solve metal fillings pollution problem；The cracking of exposed collector is avoided at the same time, helps weld tabs without additional, solves the problems, such as that exposed collector is easy to crack in the prior art.
Description
Technical field
The present invention relates to battery and its lug, the battery modules using the battery.
Background technology
Flexible packing lithium ion battery is simple in structure, light-weight, energy density is high, while has preferable power-performance, follows
The features such as ring performance, its application field is more and more extensive, its demand is also increasing.
Flexible packing lithium ion battery anode ear and negative electrode lug are usually single molding aluminium flake or copper sheet, anode ear and cathode
The exposed collector of piece welds together, and the exposed collector of negative electrode lug and negative plate welds together；But positive plate and anode
Piece collector foil is relatively thin, if lug is directly welded on the exposed collector of pole piece, exposed collector it is easy to crack and
It is easy to and welding base adhesion, extreme influence product qualification rate and welding effect.The method used at present is in exposed afflux
Plus helping weld tabs on body foil, then carry out prewelding, cut, the process such as tab welding, but tab cutting process and weld twice
Metal fillings pollution is also easy to produce, and welding is poor, so that the performance of battery performance is influenced, while there are security risk.
The content of the invention
It is an object of the invention to provide a kind of battery, outside when solving that lug is welded with exposed collector in the prior art
Dew collector is easy to crack and cuts the problem of metal fillings that exposed collector produces pollutes；In addition, the present invention also aims to
A kind of lug and the battery modules using the battery are provided.
To achieve the above object, the technical solution of the first of battery of the invention is：Battery includes battery core and lug, electricity
Pole piece is equipped with core, pole piece is equipped with exposed collector, and the lug includes body, and the exposed collection of clamping is welded with body
The clamping piece of fluid, clamping piece are welded and fixed with exposed collector, are carried out by the way that exposed collector is installed between clamping piece
Welding, reduces exposed collector and cuts process, solve metal fillings pollution problem；The cracking of exposed collector, nothing are avoided at the same time
Additional weld tabs need to be helped, solve the problems, such as that exposed collector is easy to crack in the prior art.
Second of technical solution of the battery of the present invention is, on the basis of the first technical solution of the battery of the present invention
On, the clamping piece in exposed collector both sides is an integral structure, easy to weld.
The third technical solution of the battery of the present invention is, on the basis of the first technical solution of the battery of the present invention
On, the clamping piece is equipped with two, and two clamping pieces are in the both sides of exposed collector, caused by avoiding folding clamping piece possible
Cracking.
4th kind of technical solution of the battery of the present invention is, on the basis of the first technical solution of the battery of the present invention
On, at least side of the exposed collector is equipped with least two clamping pieces, and intensity is improved using multiple clamping pieces.
5th kind of technical solution of the battery of the present invention is, on the basis of the 4th kind of technical solution of the battery of the present invention
On, the quantity of the clamping piece of the both sides of the exposed collector is identical.
The 6th kind of technical solution of battery of the present invention be, the present invention battery the first to the 5th kind of technical solution
In on the basis of any technical solution, the welding manner of the body and clamping piece is butt welding, ensures body and clamping
The uniformity of piece thickness, easy to encapsulate.
The 7th kind of technical solution of battery of the present invention be, the present invention battery the first to the 5th kind of technical solution
In on the basis of any technical solution, the welding manner of the body and clamping piece welds for overlap joint, and welding manner is more stable.
The 8th kind of technical solution of battery of the present invention be, the present invention battery the first to the 5th kind of technical solution
In on the basis of any technical solution, be connected together between the exposed collector and clamping piece by supersonic welding, ultrasound
Wave soldering is connect due to not conveying electric current to workpiece, does not also apply heat source to workpiece, during therefore, it is possible to effectively overcome resistance welding
Phenomena such as caused splashing and oxidation, improve the yield rate and quality of battery.
The 9th kind of technical solution of battery of the present invention be, the present invention battery the first to the 5th kind of technical solution
In on the basis of any technical solution, two corners of one end that the clamping piece extends towards exposed collector direction are in circle
Arcuation；And/or two corners of the body towards one end of extension on the outside of battery core are in arc-shaped, are avoided on body and clamping piece
Two sharp keen corners puncture aluminum plastic film and exposed collector.
The technical solution of the first of lug of the present invention is：Lug includes body, is welded and fixed on body and is useful for pressing from both sides
Hold the clamping piece of exposed collector, clamping piece is welded and fixed with body, by by exposed collector be installed between clamping piece into
Row welding, reduces exposed collector and cuts process, solve metal fillings pollution problem；The cracking of exposed collector is avoided at the same time,
Weld tabs is helped without additional, solves the problems, such as that exposed collector is easy to crack in the prior art.
Second of technical solution of the lug of the present invention is, on the basis of the first technical solution of the lug of the present invention
On, the clamping piece for being arranged on exposed collector both sides is an integral structure, easy to weld.
The third technical solution of the lug of the present invention is, on the basis of the first technical solution of the lug of the present invention
On, the clamping piece is equipped with two, and two opposite sides of two clamping pieces are the weldering for being welded and fixed with exposed collector
Junction, cracking caused by avoiding folding clamping piece possible.
4th kind of technical solution of the lug of the present invention is, on the basis of the first technical solution of the lug of the present invention
On, the clamping piece is equipped with two groups, and one of which includes at least two clamping pieces, and two opposite sides are on two groups of clamping pieces
For the welding surface being welded and fixed with exposed collector, improve intensity using multiple clamping pieces.
5th kind of technical solution of the lug of the present invention is, on the basis of the 4th kind of technical solution of the lug of the present invention
On, the clamping piece quantity in two groups is identical.
The 6th kind of technical solution of lug of the present invention be, the present invention lug the first to the 5th kind of technical solution
In on the basis of any technical solution, the welding manner of the body and clamping piece is butt welding, ensures body and clamping
The uniformity of piece thickness, easy to encapsulate.
The 7th kind of technical solution of lug of the present invention be, the present invention lug the first to the 5th kind of technical solution
In on the basis of any technical solution, the welding manner of the body and clamping piece welds for overlap joint, and welding manner is more stable.
The 8th kind of technical solution of lug of the present invention be, the present invention lug the first to the 5th kind of technical solution
In on the basis of any technical solution, ultrasonic bonding does not also apply heat source due to not conveying electric current to workpiece to workpiece,
Caused splashing and phenomena such as oxidation during therefore, it is possible to effectively overcome resistance welding, improves the yield rate and quality of battery.
The 9th kind of technical solution of lug of the present invention be, the present invention lug the first to the 5th kind of technical solution
In on the basis of any technical solution, the clamping piece is used for two corners of one end towards the extension of exposed collector direction
In arc-shaped；And/or two corners that the body is used for towards one end of extension on the outside of battery core are in arc-shaped, avoid body and
Two sharp keen corners on clamping piece puncture aluminum plastic film and exposed collector.
The technical solution of the first of battery modules of the present invention is：Battery modules include battery mould bases and are placed in battery mould
Battery in frame, the battery include battery core and lug, and pole piece is equipped with battery core, and pole piece is equipped with exposed collector, the pole
Ear includes body, and the clamping piece for clamping exposed collector is welded with body, and clamping piece is welded and fixed with exposed collector,
Welded by the way that exposed collector is installed between clamping piece, reduce exposed collector and cut process, solve metal fillings
Pollution problem；The cracking of exposed collector is avoided at the same time, helps weld tabs without additional, it is easy to solve exposed collector in the prior art
The problem of cracking.
Second of technical solution of the battery modules of the present invention is, in the first technical solution of the battery modules of the present invention
On the basis of, the clamping piece in exposed collector both sides is an integral structure, easy to weld.
The third technical solution of the battery modules of the present invention is, in the first technical solution of the battery modules of the present invention
On the basis of, the clamping piece is equipped with two, and two clamping pieces are in the both sides of exposed collector, avoids folding clamping piece may
Caused by cracking.
4th kind of technical solution of the battery modules of the present invention is, in the first technical solution of the battery modules of the present invention
On the basis of, at least side of the exposed collector is equipped with least two clamping pieces, and intensity is improved using multiple clamping pieces.
5th kind of technical solution of the battery modules of the present invention is, in the 4th kind of technical solution of the battery modules of the present invention
On the basis of, the quantity of the clamping piece of the both sides of the exposed collector is identical.
The 6th kind of technical solution of battery modules of the present invention be, the present invention battery modules the first to the 5th kind
In technical solution on the basis of any technical solution, the welding manner of the body and clamping piece is butt welding, ensures this
The uniformity of body and clamping piece thickness, easy to encapsulate.
The 7th kind of technical solution of battery modules of the present invention be, the present invention battery modules the first to the 5th kind
In technical solution on the basis of any technical solution, the welding manner of the body and clamping piece welds for overlap joint, welding side
Formula is more stable.
The 8th kind of technical solution of battery modules of the present invention be, the present invention battery modules the first to the 5th kind
In technical solution on the basis of any technical solution, one is connected on by supersonic welding between the exposed collector and clamping piece
Rise, ultrasonic bonding does not also apply heat source, therefore, it is possible to effectively overcome electricity due to not conveying electric current to workpiece to workpiece
Caused splashing and phenomena such as oxidation when welding resistance connects, improves the yield rate and quality of battery.
The 9th kind of technical solution of battery modules of the present invention be, the present invention battery modules the first to the 5th kind
In technical solution on the basis of any technical solution, two of one end that the clamping piece extends towards exposed collector direction
Corner is in arc-shaped；And/or two corners of the body towards one end of extension on the outside of battery core are in arc-shaped, avoid body and
Two sharp keen corners on clamping piece puncture aluminum plastic film and exposed collector.
Brief description of the drawings
Fig. 1 is the structure diagram of the specific embodiment 1 of the battery of the present invention；
Fig. 2 is the structure diagram of the exposed collector of the specific embodiment 1 of the battery of the present invention；
Fig. 3 is the structure diagram of the anode ear of the specific embodiment 1 of the battery of the present invention；
Fig. 4 is the structure diagram of the negative electrode lug of the specific embodiment 1 of the battery of the present invention；
Fig. 5 is side view of the lug with exposed collector of the specific embodiment 1 of the present invention；
Fig. 6 is side view of the lug with exposed collector of the specific embodiment 2 of the battery of the present invention；
Fig. 7 is side view of the lug with exposed collector of the specific embodiment 3 of the battery of the present invention；
Fig. 8 is side view of the lug with exposed collector of the specific embodiment 4 of the battery of the present invention.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment 1 of the battery of the present invention, as shown in Figures 1 to 5, battery include battery core 8 and wrap up battery core 8
Aluminum plastic film 9, battery core 8 include positive plate and negative plate, exposed collector are equipped with positive plate and negative plate, wherein, positive plate
Exposed collector be the exposed collector 5 of positive plate, the exposed collector of negative plate is the exposed collector 6 of negative plate, positive plate
Exposed collector 5 and the exposed collector 6 of negative electrode lug link together with lug so that with extraneous energy exchange occurs for battery core 8,
Collector 5 wherein exposed with positive plate be connected for anode ear 1, collector 6 exposed with negative plate be connected for negative electrode lug 10.
Anode ear 1 and negative electrode lug 10 are formed by two parts, and a part is for pasting gel 4 and exposing aluminum plastic film 9
Outer body, another part are for the clamping piece that is connected with exposed collector, and the welding manner between clamping piece and body
For butt welding, wherein, the clamping piece that collector 5 exposed with positive plate is connected is anode ear clamping piece 2, with the exposed collection of negative plate
The clamping piece that fluid 6 connects is negative electrode lug clamping piece 11, certainly, in other embodiments, the welding between clamping piece and body
Mode can also overlap welding.Wherein, the end face of the end face of clamping piece and body is welded on by so-called butt welding
Together, so-called overlap joint welding welds together the side of the side of clamping piece and body.Clamping piece is equipped with two, two folders
The thickness for holding piece is 0.1 μm, then will folder in order to avoid exposed collector and aluminum plastic film 9 are pierced through in the sharp keen corner of lug
The corner for holding one end that piece extends towards exposed collector is arranged to arc-shaped, one end by body towards aluminum plastic film 9 outside
Corner is arranged to arc-shaped, and the diameter of each circular arc corner is 2-10mm.Improve the quality and yield rate of battery.In addition,
In other embodiments, clamping piece can also have three pieces, more than two any number of lug sheet bodies such as four.
When being welded to clamping piece and exposed collector, the clamping piece of anode ear 1 and negative electrode lug 10 is first by exposed afflux
Body is installed between two clamping pieces, then by two clamping pieces and exposed collector by be ultrasonically bonded to together, without
Welding helps weld tabs on exposed collector, reduces prewelding and the process cut, and clamp exposed collection using two clamping pieces
The mode of fluid, exposed collector is bonding with welding base when can also avoid welding.Wherein, clamping piece and exposed collector
Welding region 7 as shown in Figures 1 to 5.
Preferably, the body of anode ear 1 and clamping piece are aluminium, and the body and clamping piece of negative electrode lug 10 are copper nickel plating,
Reduce the impedance of lug.
The specific embodiment 2 of the battery of the present invention, with differing only in for the specific embodiment 1 of the battery of the present invention：Such as
Shown in Fig. 6, anode ear clamping piece 22 is an integral structure, and the exposed collector of positive plate is clamped by folding anode ear clamping piece 22
25, and be welded and fixed between the body of anode ear clamping piece 22 and anode ear 21.
The specific embodiment 3 of the battery of the present invention, with differing only in for the specific embodiment 1 of the battery of the present invention：Such as
Shown in Fig. 7, anode ear clamping piece 32 is equipped with three, and two of which anode ear clamping piece 32 is placed in the exposed collector 35 of positive plate
Side, a piece of anode ear clamping piece 32 are placed in the opposite side of the exposed collector 35 of positive plate.
The specific embodiment 4 of the battery of the present invention, with differing only in for the specific embodiment 1 of the battery of the present invention：Such as
Shown in Fig. 8, the welding manner between the body of the anode ear clamping piece 42 and anode ear 41 welds for overlap joint.
The specific embodiment 5 of the battery of the present invention, with differing only in for the specific embodiment 1 of the battery of the present invention：Just
Two corners that lug clamping piece is placed in the downside of the adhesive area of gel on anode ear are in arc-shaped.
It is any in the specific embodiment 1-5 of the battery of the specific embodiment of the lug of the present invention, the lug and the present invention
Lug described in one is identical, repeats no more.
The specific embodiment of the battery modules of the present invention, battery modules include battery mould bases and the electricity being placed in battery mould bases
Pond, the battery is identical with battery any one of in the specific embodiment 1-5 of the battery of the present invention, repeats no more.
The battery and its lug of the present invention, using the battery battery modules other embodiment, clamping piece and exposed collection
The welding procedure of fluid can be Laser Welding, thermocompression bonding etc.；The size of circular arc chamfering can be arbitrary；Clamping piece can have two
A, any amounts such as three.
Above content is with reference to a kind of specific embodiment to the further description made by the present invention, it is impossible to is recognized
The specific implementation of the fixed present invention is confined to these explanations.For the personnel of the technical field of the invention, do not departing from
On the premise of present inventive concept, some simple deduction or replace can also be made, should all be considered as protection scope of the present invention.
Claims (10)
1. battery, including battery core and lug, pole piece is equipped with battery core, pole piece is equipped with exposed collector, it is characterised in that：It is described
Lug includes body, and the clamping piece for clamping exposed collector is welded with body, and clamping piece and the welding of exposed collector are solid
It is fixed.
2. battery according to claim 1, it is characterised in that：Clamping piece in exposed collector both sides is integral type knot
Structure.
3. battery according to claim 1, it is characterised in that：The clamping piece is equipped with two, and two clamping pieces are in outer
Reveal the both sides of collector.
4. battery according to claim 1, it is characterised in that：At least side of the exposed collector is equipped with least two
Clamping piece.
5. battery according to claim 4, it is characterised in that：The quantity phase of the clamping piece of the both sides of the exposed collector
Together.
6. according to the battery any one of claim 1-5, it is characterised in that：The welding manner of the body and clamping piece
For butt welding.
7. according to the battery any one of claim 1-5, it is characterised in that：The welding manner of the body and clamping piece
Welded for overlap joint.
8. according to the battery any one of claim 1-5, it is characterised in that：Between the exposed collector and clamping piece
It is connected together by supersonic welding.
9. lug, it is characterised in that：The lug is the lug in the battery in claim 1-8 described in any one.
10. battery modules, including battery mould bases and the battery that is placed in battery mould bases, it is characterised in that：The battery is right
It is required that the battery in 1-8 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711270583.XA CN107919455A (en) | 2017-12-05 | 2017-12-05 | Battery and its lug, the battery modules using the battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711270583.XA CN107919455A (en) | 2017-12-05 | 2017-12-05 | Battery and its lug, the battery modules using the battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107919455A true CN107919455A (en) | 2018-04-17 |
Family
ID=61898452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711270583.XA Withdrawn CN107919455A (en) | 2017-12-05 | 2017-12-05 | Battery and its lug, the battery modules using the battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107919455A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708015A (en) * | 2021-07-01 | 2021-11-26 | 浙江柔震科技有限公司 | Utmost point ear, pole piece subassembly and battery |
| CN115207574A (en) * | 2021-04-13 | 2022-10-18 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for welding foils |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203674299U (en) * | 2013-11-11 | 2014-06-25 | 浙江万向亿能动力电池有限公司 | Connection structure of laminated pole piece foils and tab of lithium battery |
| CN204303902U (en) * | 2014-11-26 | 2015-04-29 | 山东神工海特电子科技有限公司 | Soft package lithium battery band glue lug |
| CN204966577U (en) * | 2015-08-01 | 2016-01-13 | 深圳市三和朝阳科技有限公司 | Take polymer battery of fillet utmost point ear |
| CN107452934A (en) * | 2016-05-31 | 2017-12-08 | 万向二三股份公司 | Soft package lithium ion power battery tab welding structure and its welding method |
-
2017
- 2017-12-05 CN CN201711270583.XA patent/CN107919455A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203674299U (en) * | 2013-11-11 | 2014-06-25 | 浙江万向亿能动力电池有限公司 | Connection structure of laminated pole piece foils and tab of lithium battery |
| CN204303902U (en) * | 2014-11-26 | 2015-04-29 | 山东神工海特电子科技有限公司 | Soft package lithium battery band glue lug |
| CN204966577U (en) * | 2015-08-01 | 2016-01-13 | 深圳市三和朝阳科技有限公司 | Take polymer battery of fillet utmost point ear |
| CN107452934A (en) * | 2016-05-31 | 2017-12-08 | 万向二三股份公司 | Soft package lithium ion power battery tab welding structure and its welding method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115207574A (en) * | 2021-04-13 | 2022-10-18 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for welding foils |
| CN115207574B (en) * | 2021-04-13 | 2024-03-15 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for welding foils |
| CN113708015A (en) * | 2021-07-01 | 2021-11-26 | 浙江柔震科技有限公司 | Utmost point ear, pole piece subassembly and battery |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180417 |
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| WW01 | Invention patent application withdrawn after publication |