CN208208887U - Improve the flexible battery of bending property - Google Patents
Improve the flexible battery of bending property Download PDFInfo
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- CN208208887U CN208208887U CN201820121785.1U CN201820121785U CN208208887U CN 208208887 U CN208208887 U CN 208208887U CN 201820121785 U CN201820121785 U CN 201820121785U CN 208208887 U CN208208887 U CN 208208887U
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- pole piece
- self
- positive
- supporting pole
- dentalation
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- 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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- 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
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- Connection Of Batteries Or Terminals (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model relates to flexible batteries, a kind of flexible battery improving bending property is provided, including diaphragm and positive/negative plate, positive/negative plate is positive plate or negative electrode tab, positive plate is stacked in negative electrode tab, and is separated between positive plate and negative electrode tab using diaphragm, and each positive/negative plate includes metal collector and self-supporting pole piece, metal collector has welding section, and self-supporting pole piece has the dentalation being located on welding section.Dentalation in the utility model by being set on self-supporting pole piece, on the one hand the region of transition boundary line between self-supporting pole piece and metal collector has been widened, there can be more areas to bear identical curve transition, and self-supporting pole piece and metal collector is made to be approximately an entirety, there is the phenomenon that overbending relative to bed of material region without metal collector region, can effectively improve the position during bending easy fracture the case where, guarantee the resistance to bend(ing) energy of flexible battery.
Description
Technical field
The utility model relates to flexible battery more particularly to a kind of flexible batteries for improving bending property.
Background technique
As the improvement of people's living standards, the appearance of various intelligent electronic devices facilitates people's lives, increasingly
It is mostly to be received by people.Existing intelligent electronic device is typically chosen lithium ion battery as its matched battery, this is main
Be due to lithium ion battery energy density with higher, it is light weight, small in size.
Lithium ion battery is a kind of secondary cell, it relies primarily on lithium ion and carrys out work in the movement of inside battery positive and negative anodes
Make.In charge and discharge process, lithium ion insertion and deintercalation back and forth between two electrodes: when charging, lithium ion is from positive deintercalation
Cathode is embedded in by electrolyte；It is then opposite when electric discharge.
General lithium ion battery can be divided into rectangular cell and cylindrical battery according to shape, and rectangular cell can be divided into it is applicable
Flexible packing lithium ion battery in electronic equipment for consumption and the aluminum-shell battery suitable for power type electrical equipment.Currently on the market
Popular smart phone, smartwatch, tablet computer etc. be using Soft Roll rectangular lithium ion battery.With aluminum hull Li-like ions
Battery is compared, flexible packing lithium ion battery have has a safety feature, light weight, specific capacity is big, and internal resistance is small, flexible design it is excellent
Point, therefore most intelligent electronic device uses soft bag lithium ionic cell as its power supply energy currently on the market.
The development trend of current electronic equipment for consumption is that light, thin or even some electronic products also need battery to have spy
Different attribute, such as flexible resist bending.Corresponding lithium ion battery can also develop to light, thinning.Due to inside lithium ion cell
Labyrinth, after lithium ion battery becomes lightening, with curved generation, the mechanics between internal various components is closed
System is also not quite similar.Some components are easier influence not by bending, such as diaphragm, tab, but other components such as positive and negative anodes
The pole piece bed of material, wherein the position of most fragile should be the metal collector that thickness only has more than ten micron.General coating side
Formula preparation pole piece bed of material edge linear state, the battery of preparation in bending state, bending axial direction and the bed of material and
Metal collector boundary direction is parallel, and when battery is bent, bed of material marginal position is stress concentrated position, and is easiest to break
The position split.Once the metal collector of the position is broken, then battery will occur that capacity is impaired or the feelings of battery failure
Condition.
Utility model content
The purpose of this utility model is to provide a kind of flexible batteries for improving bending property, it is intended to existing for solving
Flexible battery is in bending the problem of the boundary easy fracture of metal collector and the bed of material.
The utility model is realized in this way:
The utility model embodiment provides a kind of flexible battery for improving bending property, including diaphragm and positive/negative plate,
The positive/negative plate is positive plate or negative electrode tab, and the positive plate is stacked in the negative electrode tab, and the positive plate and institute
It states and is separated between negative electrode tab using the diaphragm, each positive/negative plate includes metal collector and is located at the metal collection
Self-supporting pole piece on fluid, the metal collector have the welding section with tab welding, and the welding section protrusion is described certainly
Pole piece is supported, and the self-supporting pole piece has the dentalation being located on the welding section.
Further, the dentalation is zigzag, comb teeth dress or wavy.
Further, the self-supporting pole piece is strip, and the dentalation is along the self-supporting pole piece
Width direction extend, and the dentalation be comb teeth-shaped when, each equal equidistantly distributed of comb teeth.
Further, the positive plate and the negative electrode tab all have multi-disc, and the positive plate and the negative electrode tab are successively
Staggeredly it is stacked.
Further, the adhesive tape for coating the tab is provided on the welding section.
Further, the size of the negative electrode tab is greater than the size of the positive plate, and the dentalation of the negative electrode tab
Height be greater than the positive plate dentalation height.
Further, the edge of the diaphragm exceeds the edge 1-1.5mm of the self-supporting pole piece.
The utility model has the following beneficial effects:
In the flexible battery of the utility model, it is machined with dentalation in one end of self-supporting pole piece, so that the bed of material and gold
Belonging to has a variety of different angles between the transition boundary line direction and the curved axis direction of flexible battery of collector, and even
In there is vertical possibility, on the one hand this change has widened the bed of material-metal collector transition boundary line region, can have more
Area bear identical curve transition process；On the other hand, when curved axis direction and bed of material boundary line occur centainly
Angle after, the bed of material-metal collector boundary bending force state will also change, other than bed of material region and the bed of material
Metal collector region will be more towards become an entirety, without metal collector region relative to bed of material region
There is the phenomenon that overbending, can effectively improve the feelings of the bed of material-metal collector boundary line easy fracture during bending
Condition, to improve the resistance to bend(ing) energy of flexible battery.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural representation of the positive/negative plate of the flexible battery provided by the embodiment of the utility model for improving bending property
Figure；
Fig. 2 is that the self-supporting pole piece of the flexible battery of the raising bending property of Fig. 1 forms the structural representation of dentalation
Figure；
Fig. 3 is the axial structural schematic diagram of the corresponding bending of positive/negative plate of the flexible battery of the raising bending property of Fig. 1.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Referring to figures 1-3, the utility model embodiment provides a kind of preparation method of flexible battery for improving bending property,
Mainly for the preparation of a flexible battery, and flexible battery bending property with higher, specifically, comprising the following steps:
Die cutting tool slice molding self-supporting pole piece 1 is first used, which can be used in forming positive plate and bear
Pole piece can form the bed of material on self-supporting pole piece 1, which is active material, and self-supporting pole piece 1 can be not against metal collection
The support of fluid 2 and can exist separately as lamella state, and then can easily the forming shape to the bed of material carry out
Processing, it is general to form the bed of material by the way of filtering or coating, so that entire self-supporting pole piece 1 is active self-supporting pole piece 1,
After the slicing is completed, in wherein one end of each self-supporting pole piece 1, processing is formed with dentalation 11, and self-supporting pole piece 1 has tooth
It one end of shape structure 11 should be corresponding with the welding section 21 of metal collector 2；
The self-supporting pole piece 1 of above-mentioned preparation is combined with metal collector 2, metal collector 2 has and tab welding
Welding section 21, the position of adjustment between the two when combining, so that the welding section 21 of metal collector 2 is reserved, and welding section
21 protrusion self-supporting pole pieces 1, and above-mentioned dentalation 11 is located in the welding section 21, certainly along the height side of dentalation 11
To, the welding section 21 of metal collector 2 should not be protruded, so as to there is enough bonding areas between welding section 21 and tab,
And after position adjustment is suitable between self-supporting pole piece 1 and metal collector 2, successively the two is combined, roll-in and mould
The mode cut prepares pole piece, and positive plate is all made of this mode with negative electrode tab and prepares, but positive plate and cathode on ingredient
Piece is different, for example the metal collector 2 of positive plate generallys use aluminium foil, essentially consist in its it is high voltage withstanding under oxidation reaction, and
The metal collector 2 of negative electrode tab generallys use copper foil, essentially consists in the reduction reaction under its resistance to low-voltage；
The positive plate prepared is superimposed placement with negative electrode tab, and be superimposed place when, the welding section 21 of positive plate and negative
The welding section 21 of pole piece is staggered, and the two can be located at the same side certainly, can be convenient subsequent and tab welding, also can be avoided two
In addition contact short circuit between person is separated between positive plate and negative electrode tab using diaphragm, according to required Soft Roll lithium electricity to be prepared
The actual demand in pond also can be used the progress of multipair positive and negative plate and stack according to above-mentioned lamination process, and positive plate and negative electrode tab according to
It is secondary staggeredly to carry out lamination, and after the completion of lamination, the edge of diaphragm is fixed by tape-stripping, especially corresponds to welding section 21
Marginal position to be fixed by tape-stripping, generally, the size of diaphragm is larger for positive plate is with negative electrode tab, specifically
The edge 1-1.5mm for exceeding self-supporting pole piece 1 for the edge of diaphragm, enables diaphragm to be completely covered and separates positive plate and cathode
Piece, and then avoid contact short circuit between welding section 21 and the bed of material of self-supporting pole piece 1；
The welding section 21 of positive/negative plate after stacking is welded with tab, to form battery core, and usually tab with it is right
After the welding section 21 answered is welded, rubberizing step is also carried out in welding section 21, specifically uses adhesive tape by tab and welding section 21
Package is pasted in welding position, can prevent the protective effect punctured and reinforce the position to wrapping film, avoid the occurrence of short
The problem of road；
Electrolyte is injected into the battery core of above-mentioned preparation, and by techniques such as wrapping film encapsulation, and then prepare bending
The extraordinary flexible battery of performance.
Referring to Fig. 3, by above-mentioned processing step, flexible battery after molding is in the welding section 21 of positive plate and negative electrode tab
Dentalation 11 is all had, that is, shows that there is self-supporting pole piece 1 part-structure to extend in the welding section 21 of metal collector 2,
And since it is dentalation 11, then the transition boundary between the bed of material of self-supporting pole piece 1 and metal collector 2 can be widened
Line can have more areas to bear identical curve transition process, and bending of the flexible battery in bending is axially similar
A is to 21 position of non-solder area of the transition boundary line between the bed of material and metal collector 2 of self-supporting pole piece 1 in figure
In parallel, then axial with certain space angle with bending in the transition boundary line of corresponding 21 position of welding section, even hang down
Directly, then the bed of material of self-supporting pole piece 1 and the bending force direction of the boundary of metal collector 2 change, so that self-supporting
Be more likely between pole piece 1 and metal collector 2 as an entirety, so can to avoid 2 region of metal collector relative to from
There is the phenomenon that overbending in support 1 region of pole piece, can effectively improve 2 boundary line of the bed of material-metal collector and be bent
In journey the case where easy fracture, to improve the resistance to bend(ing) energy of flexible battery.
And for the dentalation 11 of the processing formation of self-supporting pole piece 1 can there are many forms, such as zigzag, comb teeth to fill
Or it is wavy etc., usual self-supporting pole piece 1 is strip structure, and with broadside and long side, dentalation 11 is along self-supporting
The width direction of pole piece 1 extends, and when dentation result is comb teeth-shaped, each equal equidistantly distributed of comb teeth.In addition dentation is being prepared
When structure 11, a side of 2 welding section 21 of metal collector first can be corresponded to along (one of them is along width in self-supporting pole piece 1
The edge in direction) dentalation 11 is integrally formed, then according to 21 corresponding position of welding section of metal collector 2, by non-solder
The dentalation 11 of 21 corresponding position of area removes, while retaining the dentalation 11 of 21 corresponding position of welding section, more convenient.
Specifically can two embodiments be illustrated:
Embodiment one
The self-supporting pole piece 1 of active material is prepared using the mode of filtering or film；Later by self-supporting pole piece 1
It is punched out, forms width 104mm, the pole piece of long 200mm, wherein there are a height of 4mm, the sawtooth of width 3mm for width direction side
Shape side；The self-supporting pole piece 1 that has been punched and metal collector 2 be combined, roll-in；It is prepared into after pole piece is die cut later
It is 100mm to length, width is the negative electrode tab of 30mm；It is 28mm, length 97mm, single sawtooth that same mode, which prepares width,
High 2mm, the positive plate of wide 3mm；More than use positive/negative plate and diaphragm carry out lamination；In the welding that metal collector 2 is reserved
21 soldering polar ear of area, and after welding to 21 domain rubberizing of welding section；Flexible electrical is assembled by the techniques such as fluid injection and encapsulation later
Pond.
Embodiment two
The self-supporting pole piece 1 of active material is prepared using the mode of filtering or film；Later by active self-supporting
Pole piece 1 is punched out, and forms width 104mm, the pole piece of long 200mm, wherein there are a height of 4mm, width 1.5mm for width direction side
Sliver shape side, adjacent sliver spacing be 1.5mm；The self-supporting pole piece 1 that has been punched and metal collector 2 be combined, roll-in；
It is 100mm that length is prepared after pole piece is die cut later, and width is the negative electrode tab of 30mm；Same mode prepares width
For 28mm, length 97mm, the single high 2mm of sliver shape material, the positive plate of wide 1.5mm, the spacing of adjacent sliver is 1.5mm；Make
Lamination is carried out with above positive/negative plate and diaphragm；In 21 soldering polar ear of welding section that metal collector 2 is reserved, and after welding
To 21 domain rubberizing of welding section；Flexible battery is assembled by the techniques such as fluid injection and encapsulation later.
By above-mentioned technological parameter flexible battery after molding, since there is zigzag or comb teeth-shaped in welding section 21
Dentalation 11 so that flexible battery has stronger resistance to bend(ing) in the boundary of self-supporting pole piece 1 and metal collector 2
Can, flexible battery is not easy to be broken here.In addition by upper comparison it is found that the size of negative electrode tab is greater than just in same flexible battery
The size of pole piece, when as strip, the length and width of negative electrode tab are all larger than the length and width of positive plate, accordingly, bear
The height of the dentalation of pole piece is greater than the height of the dentalation of positive plate, and negative electrode tab can be completely covered positive plate, avoid
It is exposed, it can guarantee the safety of battery.
Referring to Fig. 1 and Fig. 3, the utility model embodiment also provides a kind of flexible battery for improving bending property, can be with
Molding is prepared using above-mentioned preparation process, naturally it is also possible to adopt and otherwise prepare, only flexible battery after molding
In, the welding section 21 of the corresponding metal collector 2 of self-supporting pole piece 1 is provided with dentalation 11, and specifically, which includes
Positive/negative plate, positive plate is similar with negative plate structure, is all made of similar technique preparation, is provided with diaphragm between the two, positive and negative
Pole piece includes self-supporting pole piece 1 and metal collector 2, and wherein self-supporting pole piece 1 is located in metal collector 2, metal collector 2
With welding section 21, the welding section 21 be used for tab welding and protrusion self-supporting pole piece 1, and self-supporting pole piece 1 it is corresponding should
The position of welding section 21 has dentalation 11, and dentalation 11 is located on welding section 21.Pass through propping up certainly for this structure type
The welding section 21 for supportting pole piece 1 and metal collector 2 cooperates, and can be conducive to improve the resistance to bend(ing) of flexible battery in the position
Can, in bending, which will not produce fracture flexible battery easily, guarantee the service life of flexible battery and using peace
Entirely.In addition, the other structures of flexible battery describe close with the structure in above-mentioned preparation method, details are not described herein.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (7)
1. a kind of flexible battery for improving bending property, including diaphragm and positive/negative plate, the positive/negative plate be positive plate or
Person's negative electrode tab, the positive plate are stacked in the negative electrode tab, and between the positive plate and the negative electrode tab using it is described every
Film separates, it is characterised in that: each positive/negative plate include metal collector and in the metal collector from
Pole piece is supported, the metal collector has the welding section with tab welding, and the self-supporting pole piece is protruded in the welding section, and
The self-supporting pole piece has the dentalation being located on the welding section.
2. improving the flexible battery of bending property as described in claim 1, it is characterised in that: the dentalation is sawtooth
Shape, comb teeth dress or wavy.
3. improving the flexible battery of bending property as claimed in claim 2, it is characterised in that: the self-supporting pole piece is length
Strip, the dentalation along the self-supporting pole piece width direction extend, and the dentalation be comb teeth-shaped when,
Each equal equidistantly distributed of comb teeth.
4. improving the flexible battery of bending property as described in claim 1, it is characterised in that: the positive plate and the cathode
Piece all has multi-disc, and the positive plate and the negative electrode tab are successively staggeredly stacked.
5. improving the flexible battery of bending property as described in claim 1, it is characterised in that: be provided with packet on the welding section
Cover the adhesive tape of the tab.
6. improving the flexible battery of bending property as described in claim 1, it is characterised in that: the size of the negative electrode tab is greater than
The size of the positive plate, and the height of the dentalation of the negative electrode tab is greater than the height of the dentalation of the positive plate.
7. improving the flexible battery of bending property as described in claim 1, it is characterised in that: the edge of the diaphragm exceeds institute
State the edge 1-1.5mm of self-supporting pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820121785.1U CN208208887U (en) | 2018-01-25 | 2018-01-25 | Improve the flexible battery of bending property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820121785.1U CN208208887U (en) | 2018-01-25 | 2018-01-25 | Improve the flexible battery of bending property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208208887U true CN208208887U (en) | 2018-12-07 |
Family
ID=64534283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820121785.1U Active CN208208887U (en) | 2018-01-25 | 2018-01-25 | Improve the flexible battery of bending property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208208887U (en) |
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2018
- 2018-01-25 CN CN201820121785.1U patent/CN208208887U/en active Active
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