CN107170991A - The protection structure of lug edge collector and guard method in lithium ion battery level piece - Google Patents
The protection structure of lug edge collector and guard method in lithium ion battery level piece Download PDFInfo
- Publication number
- CN107170991A CN107170991A CN201611006924.8A CN201611006924A CN107170991A CN 107170991 A CN107170991 A CN 107170991A CN 201611006924 A CN201611006924 A CN 201611006924A CN 107170991 A CN107170991 A CN 107170991A
- Authority
- CN
- China
- Prior art keywords
- collector
- lug
- lithium ion
- ion battery
- battery level
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
This application discloses the protection structure of lug edge collector in a kind of lithium ion battery level piece and guard method, wherein protection structure is：Lithium ion battery level piece includes collector and the lug welded with the collector, and the first Protection glue being interposed between the end of the lug and the collector is pasted with the first position of the collector.The application can reduce destruction of the lug to collector, improve the service life and security of lithium ion battery.
Description
Technical field
The application is related to the technical field of lithium ion battery especially lithium-ion electric level piece, and in particular to a kind of lithium-ion electric
The protection structure of lug edge collector in the level piece of pond.
Background technology
Existing lithium ion cell positive ear typically uses aluminium pole ears (or other metals and alloy), and collector is aluminium foil；It is negative
Lug uses nickel lug (or other metals and alloy), and collector is copper foil.Using the method (super weldering, rivet welding etc.) of welding by pole
Ear is connected on a current collector.Can be in 90 ° or close to 90 °, sharp edges using the lug edge of machining cutting.
Fig. 1 is the structural representation of existing traditional lithium-ion battery pole piece, and it mainly includes collector 1, lug 2, high temperature
Protection glue 5 and lug Protection glue 6, wherein, a part of area of the collector 1 is applied active material and forms dressing area 7,
And another part is the clear area for being not coated with active material.During making, lug Protection glue 6 is attached to the proper site of lug 2, so
The lug 2 with lug Protection glue 6 is welded on collector 1 (clear area for being specifically welded on collector) afterwards, finally sticked
High temperature protection glue 5.The lug Protection glue 6 and high temperature protection glue 5 typically use adhesive tape type structure.
Fig. 2 is a kind of collector schematic diagram of typical lug to be welded in the prior art, wherein to the blank of collector
Do not protect in area.
In the manufacturing process of lithium ion battery, sharp edge (especially lug end) can be to lithium-ion electric on lug
The collector formation destruction in pond；During battery use, the bounce-back of negative material can oppress lug, so that lug is to afflux
Body has bigger destruction；Two kinds of modes of action, which are combined, can make the edge of lug produce destruction to collector, cause battery adding
During work or use, part or complete rupture occur for the collector at lug edge, so that battery failure, or even cause tight
The security risk of weight.
In the battery manufacture stage, the welding of lug, the rubberizing of Protection glue etc. can produce a lug and collector cut
Shear force；Expanded when being charged in battery charge and discharge process in the space of fixed volume due to negative pole, can ceaselessly extrude lug
And collector, shearing force of the lug to collector is produced, and the shearing force can always not in the whole life cycle of battery
The appearance stopped；And two kinds of shearing forces are inevitable.Collector is sticked after twice Protection glue, and shearing force remains unchanged presence, but by
In protective effect of the adhesive tape to collector, lug can be substantially reduced to the destructiveness of collector, so as to strengthen lithium ion battery
Service life and security.
The content of the invention
The purpose of the application is：In view of the above-mentioned problems, proposing lug edge collector in a kind of lithium ion battery level piece
Protection structure, to reduce destruction of the lug to collector, improves the service life and security of lithium ion battery.
In order to achieve the above object, the technical scheme of the application is：
A kind of protection structure of lug edge collector in lithium ion battery level piece, the lithium ion battery level piece includes collection
Fluid and the lug welded with the collector, the first position of the collector be pasted be interposed between the end of the lug with
The first Protection glue between the collector.
In some preferred embodiments of this application, it is pasted with the second position of the collector and is interposed between the lug
The second Protection glue between non-end position and the collector.
More preferably, first Protection glue and the second Protection glue are spaced from each other is set.
Still more preferably it is that second Protection glue and the first Protection glue are respectively close to upper and lower the two of the collector
Opposite end is arranged.
In this some embodiments of the present application, the lug is positive pole ear.Preferably, the lug is aluminium pole ears, institute
Collector is stated for aluminium foil.
In this some embodiments of the present application, the lug is negative lug.Preferably, the lug is nickel lug, institute
Collector is stated for copper foil.
The application also proposed a kind of guard method of lug edge collector in lithium ion battery level piece, this method bag
Include：
The first Protection glue spaced apart from each other and the are pasted in the bottom position respectively close to collector and upper end position
Two Protection glues；
Then by tab welding on the collector, and ensure that first Protection glue is interposed between the end of the lug
Between the collector, second Protection glue is interposed between the non-end position of the lug and the collector.
The collector is preferably aluminium foil or copper foil.
The advantage of the application is：
1st, the application has pasted the Protection glue being interposed between lug end and collector on a current collector, in the making of battery
And in charge and discharge process, lug to the shearing force of collector will not (or only sub-fraction) directly act on collector, namely
Lug can be directly acted in Protection glue rather than on collector to whole (or overwhelming majority) shearing force of collector, Protection glue tool
Play the role of to absorb and cut down shearing force, this greatly reduces destruction of the lug to collector, improve the use longevity of lithium ion battery
Life property and security.
2nd, the application has further pasted at another position of collector and has been interposed between the non-end position of lug and collector
Another Protection glue, collector formation is protected by Protection glue (arranged apart) at two, destructiveness of the lug to collector
Further reduction, so as to further enhance the service life and security of lithium ion battery.
Brief description of the drawings
Fig. 1 is that the structure of conventional lithium ion battery level piece is extremely intended to, for convenience reason of the reader to technical scheme
The structure of high temperature protection glue is made perspective processing by spy in solution, the figure；
Fig. 2 is the structural representation of collector in conventional lithium ion battery level piece；
Fig. 3 is that the structure of lithium ion battery level piece in the embodiment of the present application is extremely intended to, and reader is to the application skill for convenience
The structure of high temperature protection glue is made perspective processing by spy in the understanding of art scheme, the figure；
Fig. 4 is to paste the method demonstration graph of Protection glue on a current collector in the embodiment of the present application；
Wherein：1- collectors, 2- lugs, the Protection glues of 3- first, the Protection glues of 4- second, 5- high temperature protection glue, 6- lugs are protected
Protect glue, 7- dressing area.
Embodiment
The present invention is described in further detail below by embodiment combination accompanying drawing.The application can be with a variety of
Different forms is realized, however it is not limited to embodiment described by the present embodiment.The purpose of detailed description below is provided
It is easy for becoming apparent from present disclosure thorough explanation, the words of the wherein indicating position such as upper and lower, left and right is only pin
To shown structure in respective figure for position.
However, those skilled in the art may be aware that one or more detail description can be by
Omit, or can also be using other methods, component or material.In some instances, some embodiments are not described
Or be not described later in detail.
In addition, technical characteristic described herein, technical scheme can also be closed arbitrarily in one or more embodiments
Suitable mode is combined.For those skilled in the art, it is easy to understand with provided herein is embodiment relevant method
Step or operation order can also change.Therefore, any order in drawings and examples is merely illustrative purposes, not secretly
Show requirement in a certain order, require unless expressly stated according to a certain order.
It is herein part institute serialization number itself, such as " first ", " second ", is only used for the object described by distinguishing,
Without any order or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, including directly and
It is indirectly connected with (connection).
Fig. 3 and Fig. 4 show one of the protection structure of lug edge collector in this lithium ion battery level piece of the application
The identical of individual specific embodiment, wherein lithium ion battery level piece and conventional lithium ion battery level piece in Fig. 1 is that it also includes collection
Fluid 1, lug 2, high temperature protection glue 5 and lug Protection glue 6, wherein, a part for the collector 1 be applied active material and
Dressing area 7 is formed, and another part is not coated with active material and is clear area (namely region in figure indicated by label 1), pole
Ear 2 is welded on collector 1 (clear area for being specifically welded on collector).
The key improvements of the present embodiment are：The end for being interposed between the lug 2 is pasted with the first position of the collector 1
The first Protection glue 3 between portion and the collector 1.
It can be appreciated that above-mentioned first Protection glue 3 being pasted onto on collector 1 be interposed between the end of lug 2 and collector 1 it
Between, so that the end of lug 2 will not directly be contacted with collector 1,
In the making of battery and charge and discharge process, lug 2 will not (or only sub-fraction) to the shearing force of collector 1
Collector is directly acted on, namely lug 2 can directly act on the first guarantor to whole (or overwhelming majority) shearing force of collector 1
Protect on glue 3 rather than on collector 1, the first Protection glue 3 has the effect for absorbing and cutting down shearing force, and this greatly reduces 2 pairs of lug
The destruction of collector 1, improves the service life and security of lithium ion battery.
Although after said structure, largely strengthening the protection to collector 1, lithium ion battery is improved
Service life and security, but other edges on lug 2 in addition to lug end are still direct with collector 1
Contact, although these " other edges in addition to lug end " are in collection in the making of battery and charge and discharge process
The shearing force of the generation of fluid is smaller (shear action is not obvious in other words), but there are still destruction current collector structure can
Energy.Based on this, the present embodiment is pasted in the second position (another positions different from above-mentioned first position) of the collector 1
It is interposed between the second Protection glue 4 between the non-end position of the lug 2 and the collector 1.And second Protection glue 4 with it is above-mentioned
First Protection glue 3 (i.e. non-zero distance) spaced from each other is set.Further, second Protection glue 4 and above-mentioned first
Protection glue 3 is arranged respectively close to upper and lower two opposite end of the collector 1.
Consequently, it is possible to the second Protection glue 4 and the above-mentioned collective effect of first Protection glue 3 set up, and the two is spaced from each other
Certain distance, one close to the bottom position of collector 1 and the end of lug 2 being separated from collector, another is close to collection
The upper end position of fluid 1 and lug another part is separated from collector so that lug 2 enters to the shear action of fluid confluence 1
One step is cut down, the destruction This further reduces lug 2 to collector 1.
This protection structure of the present embodiment is not only suitable for anode pole piece, is applied to cathode pole piece again.When it is applied to positive pole
When on pole piece, the lug 2 (positive pole ear) is preferably aluminium pole ears, and the collector 1 is preferably aluminium foil.When it is applied to positive pole
When on pole piece, the lug 2 (negative lug) is preferably nickel lug, and the collector 1 is preferably copper foil.
Refer again to shown in Fig. 3 and Fig. 4, now by the guarantor of lug edge collector in this lithium ion battery level piece of the present embodiment
Protection structure preparation method (or ion battery level piece in lug edge collector guard method) be simply described below, the party
Method：
The He of the first Protection glue 3 spaced apart from each other is pasted in the bottom position respectively close to collector 1 and upper end position
Second Protection glue 4.Then lug 2 is welded on the collector 1, and ensures that first Protection glue 3 is interposed between the pole
Between the end of ear 2 and the collector 1, second Protection glue 4 is interposed between the non-end position and the collector of the lug 2
Between 1.
By above-mentioned content introduction it can be appreciated that the pad of lug 2 and collector 1 is arranged on except the first Protection glue 3
With the region beyond the second Protection glue 4.More generically, at the first position and second position of foregoing collector 1, lug 2 with
Collector 1 is only welded without welding, lug 2 with collector 1 in the region in addition to the first Protection glue 3 and the second Protection glue 4
Connection.And the pad of lug 2 and collector 1 is arranged on the clear area (non-dressing area) of collector 1.
In the present embodiment, the first described Protection glue 3 and the second Protection glue 4 use adhesive tape type structure.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made.
Claims (10)
1. a kind of protection structure of lug edge collector in lithium ion battery level piece, the lithium ion battery level piece includes afflux
Body (1) and with the collector weld lug (2), it is characterised in that the first position of the collector (1) be pasted with every
The first Protection glue (3) between the end of the lug (2) and the collector (1).
2. the protection structure of lug edge collector in lithium ion battery level piece according to claim 1, it is characterised in that
It is pasted with and is interposed between the non-end position of the lug (2) and the collector (1) in the second position of the collector (1)
Second Protection glue (4).
3. the protection structure of lug edge collector in lithium ion battery level piece according to claim 2, it is characterised in that
First Protection glue (3) and the second Protection glue (4) setting spaced from each other.
4. the protection structure of lug edge collector in lithium ion battery level piece according to claim 3, it is characterised in that
Second Protection glue (4) and the first Protection glue (3) are arranged respectively close to upper and lower two opposite end of the collector (1).
5. the protection structure of lug edge collector in the lithium ion battery level piece according to claim 1 or 2 or 3 or 4, its
It is characterised by, the lug (2) is positive pole ear.
6. the protection structure of lug edge collector in lithium ion battery level piece according to claim 5, it is characterised in that
The lug (2) is aluminium pole ears, and the collector (1) is aluminium foil.
7. the protection structure of lug edge collector in the lithium ion battery level piece according to claim 1 or 2 or 3 or 4, its
It is characterised by, the lug (2) is negative lug.
8. the protection structure of lug edge collector in lithium ion battery level piece according to claim 7, it is characterised in that
The lug (2) is nickel lug, and the collector (1) is copper foil.
9. the guard method of lug edge collector in a kind of lithium ion battery level piece, it is characterised in that this method includes：
Pasted in the bottom position respectively close to collector (1) and upper end position the first Protection glue (3) spaced apart from each other and
Second Protection glue (4)；
Then lug (2) is welded on the collector (1), and ensures that first Protection glue (3) is interposed between the lug
(2) between end and the collector (1), second Protection glue (4) be interposed between the non-end position of the lug (2) with it is described
Between collector (1).
10. the guard method of lug edge collector in lithium ion battery level piece according to claim 9, its feature exists
In the collector (1) is aluminium foil or copper foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611006924.8A CN107170991A (en) | 2016-11-16 | 2016-11-16 | The protection structure of lug edge collector and guard method in lithium ion battery level piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611006924.8A CN107170991A (en) | 2016-11-16 | 2016-11-16 | The protection structure of lug edge collector and guard method in lithium ion battery level piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107170991A true CN107170991A (en) | 2017-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611006924.8A Pending CN107170991A (en) | 2016-11-16 | 2016-11-16 | The protection structure of lug edge collector and guard method in lithium ion battery level piece |
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| CN (1) | CN107170991A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784579A (en) * | 2016-11-29 | 2017-05-31 | 深圳市比克动力电池有限公司 | The pole piece structure and lithium ion battery of a kind of lithium ion battery |
| CN108281609A (en) * | 2018-03-27 | 2018-07-13 | 横店集团东磁股份有限公司 | A kind of anode pole piece with lug, preparation method and the lithium ion battery comprising the anode pole piece |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204167422U (en) * | 2014-08-26 | 2015-02-18 | 东莞市创明电池技术有限公司 | A kind of battery anode slice of new structure |
| CN105449160A (en) * | 2016-01-07 | 2016-03-30 | 广东凯德能源科技有限公司 | Break-resistant high-energy-density lithium ion battery positive plate and preparation method |
-
2016
- 2016-11-16 CN CN201611006924.8A patent/CN107170991A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204167422U (en) * | 2014-08-26 | 2015-02-18 | 东莞市创明电池技术有限公司 | A kind of battery anode slice of new structure |
| CN105449160A (en) * | 2016-01-07 | 2016-03-30 | 广东凯德能源科技有限公司 | Break-resistant high-energy-density lithium ion battery positive plate and preparation method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784579A (en) * | 2016-11-29 | 2017-05-31 | 深圳市比克动力电池有限公司 | The pole piece structure and lithium ion battery of a kind of lithium ion battery |
| CN108281609A (en) * | 2018-03-27 | 2018-07-13 | 横店集团东磁股份有限公司 | A kind of anode pole piece with lug, preparation method and the lithium ion battery comprising the anode pole piece |
| CN108281609B (en) * | 2018-03-27 | 2023-07-28 | 横店集团东磁股份有限公司 | Positive electrode plate with tab, preparation method thereof and lithium ion battery comprising positive electrode plate |
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