CN209401729U - A kind of flexible battery of tab optimization - Google Patents
A kind of flexible battery of tab optimization Download PDFInfo
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- CN209401729U CN209401729U CN201920175276.1U CN201920175276U CN209401729U CN 209401729 U CN209401729 U CN 209401729U CN 201920175276 U CN201920175276 U CN 201920175276U CN 209401729 U CN209401729 U CN 209401729U
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- tab
- wrapping film
- electrode assemblies
- optimization
- flexible battery
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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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Abstract
The utility model provides a kind of flexible battery of tab optimization, the flexible battery includes tab, electrode assemblies and wrapping film, the electrode assemblies are coated in the wrapping film, described tab one end is connect with the electrode assemblies and the tab is drawn by the wrapping film, the wrapping film is sealed in the tab extraction location, one end that the tab connects the electrode assemblies has bending part, the bending part is bent along the length extending direction of the tab with many places, and the bending part is respectively positioned in the wrapping film, gap at the top of the wrapping film and the bending part is greater than the gap between the wrapping film and the electrode assemblies.In the present invention, one end that the tab is connected with electrode assemblies has bending part, tab position has enough length in reserve to offset the relative displacement occurred on electrode assemblies internal-and external diameter when being bent flexible battery, and pulling force when tab position being avoided to be bent is broken.
Description
Technical field
The utility model relates to the flexible batteries that battery technology field more particularly to a kind of tab optimize.
Background technique
In recent years, novel electronic product is increasingly liked by consumer, such as intelligent helmet, intelligent shoe, collapsible hand
Machine, convertible tablet computer etc., this makes the market application prospect of flexible battery increasing, but is constrained to existing lithium electricity
When being bent by external force, for current collector material because of semidiameter generation relative displacement, this makes battery on bending outer diameter in pond
Tab position is easily broken in alternating bending, causes battery charging and discharging abnormal, based on the above issues, existing flexible battery becomes
To minimizing in lightening, in the form of ultra-thin bending internal-and external diameter difference when bending, pole caused by semidiameter is prevented with this
Ear phenomenon of rupture.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of flexible battery of tab optimization,
The flexible battery structure of tab optimization is simple, is able to maintain that tab is not broken, and battery charge and discharge performance is normal after alternating bending.
The utility model is realized in this way:
The utility model provides a kind of flexible battery of tab optimization, including tab, electrode assemblies and wrapping film, institute
Electrode assemblies are stated to be coated in the wrapping film, described tab one end connect with the electrode assemblies and the tab by
The wrapping film is drawn, and the wrapping film is sealed in the tab extraction location, and the tab connects the electrode assembling
One end of body has bending part, and the bending part is bent along the length extending direction of the tab with many places, and the bending
Portion is respectively positioned in the wrapping film, and the gap at the top of the wrapping film and the bending part is greater than the wrapping film and institute
State the gap between electrode assemblies.
Preferably, the wrapping film has tab covering portion, the tab covering portion is relative to the electrode assembling
Body pair wrapping film extend outwardly.
0.1mm~5mm preferably, the tab covering portion extends outwardly.
Preferably, the wrapping film is disposed with PP glue-line, the second glue layer, metal layer, first from inside to outside
Glue layer and nylon layer.
Preferably, the electrode assemblies include anode, membrane layer and cathode, by described between the anode and cathode
Membrane layer is separately.
Preferably, the length of the tab is 1mm~20mm.
Preferably, the tab with a thickness of 0.1mm~10mm.
Preferably, the bending part is the waveform extended along the length direction of the tab, and described wavy
Wave crest is respectively positioned on same plane, and the wavy trough is respectively positioned on same plane.
The utility model has the following beneficial effects:
1, one end that in the present invention, the tab is connected with the electrode assemblies has bending part, makes flexibility
Tab position has enough length in reserve to offset the relative displacement occurred on electrode assemblies internal-and external diameter when battery is bent, and avoids pole
Pulling force when ear position is bent is broken.
2, the utility model makes the wrapping film opposite with the tab opposite opposite with the electrode assemblies outer
Packaging film extends outwardly, and when being in internal negative pressure state, the corresponding wrapping film in tab region remains to keep enough with tab
Gap, make tab when bending have enough spaces that relative displacement occurs, tab mutually fits closely when avoiding negative pressure, hair
Resistance is excessive when raw relative displacement causes tab to be broken.
3, flexible battery provided by the utility model, when optimizing bending bending radius difference caused by tab fracture ask
Topic, there is bigger design space in thickness design with respect to ultrathin 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 schematic diagram of conventional flexible battery；
Fig. 2 is schematic diagram of the battery after negative pressure technique in Fig. 1；
Fig. 3 is the schematic diagram of battery in the bent state in Fig. 2；
Fig. 4 is the enlarged diagram of the part M in Fig. 3；
Fig. 5 is to have carried out the flexible battery signal that lug bending is handled and the wrapping film opposite with tab is not optimized
Figure；
Fig. 6 is schematic diagram of the battery after negative pressure technique in Fig. 5；
Fig. 7 is the schematic diagram of battery in the bent state in Fig. 6；
Fig. 8 is the enlarged diagram of N section in Fig. 7；
Fig. 9 is flexible battery provided by the embodiment of the utility model；
Figure 10 is flexible battery overall structure stereogram provided by the embodiment of the utility model；
Figure 11 is that top corresponding thereto is removed in the part of tab provided by the embodiment of the utility model progress bending process
Schematic diagram after wrapping film；
Figure 12 is the schematic diagram of battery in the bent state in Fig. 9；
Figure 13 is the enlarged diagram of part A in Figure 12；
Figure 14 is wrapping film schematic diagram of internal structure provided by the embodiment of the utility model；
Figure 15 is electrode assemblies schematic diagram of internal structure provided by the embodiment of the utility model；
(a) is the tab schematic diagram provided by the embodiment of the utility model being not optimised in Figure 16, and (b)~(h) is that this is practical
The a variety of prioritization scheme schematic diagrames for the tab that new embodiment provides.
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.
FIG. 1 to FIG. 4 show conventional flexible battery, the wrapping film that 203 expressions in Fig. 1 are not optimized, in Fig. 1
204 indicate the tab being not optimized, and 205 in Fig. 2 indicate to carry out the conventional skin package film after negative pressure technique, electricity shown in Fig. 1
The tab in pond is not optimized design, and the wrapping film of tab position corresponding region is also not optimized design；Battery exists
After negative pressure skill, the wrapping film opposite with the tab and the tab fit closely (Fig. 2)；When battery is curved by external force generation
Qu Shi, the length that tab region is not reserved offset bending bring displacement, ultimately cause tab fracture, electrical property failure (Fig. 3
~Fig. 4).
Wave-shape amplitude shown in Fig. 5~Fig. 8 when lug bending is larger, at the top of bending part between the wrapping film opposite with tab
Gap it is not big enough when, carry out negative pressure technique after, it is also possible to there is the phenomenon that tab fracture.202 in Fig. 5 indicate that tab carries out
The part of bending process, 203 in Fig. 5 indicate the wrapping film being not optimized, and the tab position of battery shown in Fig. 5 carries out
Optimization design, i.e., the one end tab being connected with the electrode assemblies carry out the bending process along tab length direction,
But the wrapping film opposite with tab is not optimized design, after negative pressure technique, tab closely pastes battery with wrapping film
Conjunction, for the tab optimized by bending by destruction (Fig. 6) is squeezed, 205 in Fig. 6 indicate that the routine after progress negative pressure techniques is outer
Packaging film, the tab being deformed after 206 expression negative pressure techniques in Fig. 6.When battery is bent by external force, although
Tab region has reserved length to offset bending bring displacement, but because fitting closely for wrapping film hinders the position of tab
It moves, tab can be still broken, and electrical property is caused to fail.
Such as Fig. 9~Figure 16, the utility model embodiment provides a kind of flexible battery of tab optimization, including tab and electrode
Assembly 4, the tab are connected with the electrode assemblies 4, and the electrode assemblies 4 are coated with wrapping film 3, the tab
The one end being connected with the electrode assemblies 4 is coated with the wrapping film 201 after optimization, and wrapping film 201 draws in the tab
Out position seals, and 1 in Fig. 9 indicates battery top seal region, and 2 in Fig. 9 indicate sealing and the tab between electrode assemblies
Position, one end that the tab connects the electrode assemblies 4 have bending part, and the bending part prolongs along the length of the tab
It stretches direction to bend with many places, and the bending part is respectively positioned in the wrapping film 201,202 in Fig. 9 indicate that tab carries out
The part of bending process, the wrapping film 201 are greater than the wrapping film 3 and the electricity with the gap at the top of the bending part
Gap between pole assembly 4, preferably, the wrapping film has tab covering portion, the tab covering portion is relative to institute
State electrode assemblies pair wrapping film extend outwardly, i.e., wrapping film 201 extends outwardly with respect to wrapping film 3, to tab
Pair wrapping film carry out such optimization processing after, even if the wave-shape amplitude of lug bending is larger, also can guarantee bending part
When gap between the wrapping film opposite with tab of top is sufficiently large, after carrying out negative pressure technique, 201 position of wrapping film in Fig. 9
Constant, the corresponding wrapping film in tab region remains to keep enough gaps with tab, and tab when bending is made to have enough skies
Between relative displacement occurs, tab mutually fits closely when avoiding negative pressure, and resistance is excessive when relative displacement occurs causes tab disconnected
It splits.
0.1mm~5mm preferably, the tab covering portion extends outwardly.
Preferably, the bending part is the waveform extended along the length direction of the tab, and described wavy
Wave crest is respectively positioned on same plane, and the wavy trough is respectively positioned on same plane.
The utility model bends the tab of regular length L along tab length direction, increases it and accounts in thickness direction
Reduce it while with space in the occupied space of length direction, tab position when being bent battery with this has enough pre-
Length is stayed to offset the relative displacement occurred on electrode assemblies internal-and external diameter.
As shown in figure 9, battery pole ear position 2 is bent along tab length direction, the outsourcing opposite with the tab
Dress film 201 extends outwardly with respect to the wrapping film 3 opposite with the electrode assemblies 4, tab and electrolyte after optimizing
It is encapsulated in wrapping film 201 together, electrode assemblies 4 and electrolyte are together packaged in wrapping film 3, form this reality
With the flexible battery of the novel tab optimization.
As shown in (a)~(h) in Figure 16, (a) is the tab being not optimised, and (b)~(h) is figure (a) after a variety of optimizations
Tab.Tab space length demand is L before optimizing, and space thickness demand is H, and tab space length demand is reduced into after optimization
L, tab space thickness increase in demand are h.
(b)~(h) in Figure 16 is the various embodiments of tab provided by the utility model optimization, any to set by optimization
After meter, reduce tab space length demand, the prioritization scheme of space thickness increase in demand is included in the protection of the utility model
Within the scope of.
Before tab described in the utility model optimization, space length demand can be 2~20mm, and space thickness demand can be with
For 0.01mm~5mm, tab space length demand can be 1~20mm after optimization, and space thickness demand can be 0.1mm
~10mm.
In the utility model embodiment, the technique that flexible battery carries out tab optimization includes the following steps:
S1. the one end tab being connected with the electrode assemblies carries out the bending process along tab length direction；
S2. the bending part of tab and the electrode assemblies are coated into wrapping film；
S3. the gap at the top of the wrapping film and the bending part is made to be greater than the wrapping film and the electrode assembling
Gap between body；
S4. the wrapping film is sealed in the tab extraction location；
S5. negative pressure technique is carried out to the wrapping film opposite with the tab.
Preferably, in step s3, by carrying out inner liner or punching hole to the wrapping film opposite with the tab
Shaping makes the wrapping film opposite with the tab extend outwardly with respect to the wrapping film opposite with the electrode assemblies.
The wrapping film opposite with the tab extends outwardly with respect to the wrapping film opposite with the electrode assemblies, can
To be that positive and negative anodes tab region separately designs, it is also possible to positive and negative anodes tab region and is designed together.
The wrapping film opposite with the tab extends outwardly with respect to the wrapping film opposite with the electrode assemblies, can
Individually to be formed in flexible battery upper surface described in the utility model or lower surface, can also be formed simultaneously in upper and lower surface.
The wrapping film opposite with the tab extends outwardly with respect to the wrapping film opposite with the electrode assemblies, i.e.,
The wrapping film opposite with the tab with respect to the wrapping film opposite with the electrode assemblies will more past outside protrusion, it is convex
The shape risen can be square block, and spherical shape etc. increases the shape of tab position corresponding region space thickness demand.
Preferably, such as Figure 14, it is outside from the side that the wrapping film 3 is connected with the electrode assemblies 4, it is described outer
Packaging film 3 is disposed with PP glue-line 305, the second glue layer 304, metal layer 303, the first glue layer 302 and nylon layer 301.
Preferably, the electrode assemblies include anode, membrane layer and cathode, between the anode and cathode such as Figure 15
Separately by the membrane layer, the anode is disposed with anode active material layer 401, anode from the membrane layer outward
Current collector layers 402 and anode active material layer 401, the cathode are disposed with negative electrode active material from the membrane layer outward
Layer 404, negative current collector layer 405 and anode active material layer 404.
When battery is bent, relative displacement can occur for the bending outer radius portion local inclination inner-diameter portion of electrode assemblies 4, with
The tab of the connected tab of electrode assemblies, especially bending outer radius portion connection will be stretched together with electrode assemblies.
Fig. 9~Figure 16 show an embodiment of the present invention, and in the present embodiment, flexible battery is carried out in tab part
The bending process along tab length direction is carried out, this optimization design, tab position when being bent battery has enough pre-
Length is stayed to offset the relative displacement occurred on electrode assemblies internal-and external diameter；Also, it is in the present embodiment, opposite with the tab
Wrapping film extends outwardly with respect to the wrapping film opposite with the electrode assemblies, the wrapping film warp opposite with the tab
Cross after negative pressure technique with without too big difference, i.e. flexible battery in Fig. 9 does not have too big after negative pressure technique before negative pressure technique
Variation, have enough gaps, without being close to tab, make tab between the wrapping film opposite with the tab and the tab
There is sufficient space to be subjected to displacement along bending radial direction, the generation of tab fracture is avoided with this, realizes more needed for flexible battery
Tab is continuous after secondary bending, and electrical property is normal.
The flexible battery of tab optimization provided by the utility model, structure is simple, and tab is able to maintain after alternating bending not
Fracture, battery charge and discharge performance are normal.
Such as Figure 15, electrode assemblies 4 disclosed by the utility model include plus plate current-collecting body 402, are coated in plus plate current-collecting body
Positive electrode active materials 401 on 402, negative current collector 405, coated on negative current collector negative electrode active material 404 and every
Film 403.The tab position that wherein plus plate current-collecting body 402 and negative current collector 405 extend has along the curved of tab length direction
Folding.
Be superimposed by 5 layer materials such as Figure 14, the utility model embodiment wrapping film 3 being related to and wrapping film 201 and
From inside to outside successively at, 5 layer materials are as follows: PP glue-line 305, the second glue layer 304, metal layer 303, the first glue layer 302 and Buddhist nun
Imperial layer 301.
Flexible battery described in the utility model optimizes tab breakage problem caused by bending radius difference when bending,
There is bigger design space with respect to ultrathin flexible battery in thickness design.
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 (8)
1. a kind of flexible battery of tab optimization, including tab, electrode assemblies and wrapping film, the electrode assemblies cladding
In in the wrapping film, described tab one end is connect with the electrode assemblies and the tab is drawn by the wrapping film
Out, the wrapping film is sealed in the tab extraction location, it is characterised in that: the tab connects the electrode assemblies
One end has bending part, and the bending part is bent along the length extending direction of the tab with many places, and the bending part is equal
In the wrapping film, the gap at the top of the wrapping film and the bending part is greater than the wrapping film and the electricity
Gap between the assembly of pole.
2. the flexible battery of tab optimization as described in claim 1, it is characterised in that: the wrapping film is coated with tab
Portion, the tab covering portion relative to the electrode assemblies pair wrapping film extend outwardly.
3. the flexible battery of tab optimization as claimed in claim 2, it is characterised in that: the tab covering portion extends outwardly
0.1mm~5mm.
4. the flexible battery of tab as described in claim 1 optimization, it is characterised in that: the wrapping film is from inside to outside successively
It is provided with PP glue-line, the second glue layer, metal layer, the first glue layer and nylon layer.
5. the flexible battery of tab as described in claim 1 optimization, it is characterised in that: the electrode assemblies include anode,
Membrane layer and cathode, between the anode and cathode separately by the membrane layer.
6. the flexible battery of tab as described in claim 1 optimization, it is characterised in that: the length of the tab be 1mm~
20mm。
7. the flexible battery of tab as described in claim 1 optimization, it is characterised in that: the tab with a thickness of 0.1mm~
10mm。
8. the flexible battery of tab optimization as described in claim 1, it is characterised in that: the bending part is along the tab
The waveform that length direction extends, and the wavy wave crest is respectively positioned on same plane, the wavy equal position of trough
In on same plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920175276.1U CN209401729U (en) | 2019-01-31 | 2019-01-31 | A kind of flexible battery of tab optimization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920175276.1U CN209401729U (en) | 2019-01-31 | 2019-01-31 | A kind of flexible battery of tab optimization |
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| CN209401729U true CN209401729U (en) | 2019-09-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713207A (en) * | 2019-01-31 | 2019-05-03 | 柔电（武汉）科技有限公司 | A kind of flexible battery and tab optimization technique of tab optimization |
| CN111244338A (en) * | 2020-04-27 | 2020-06-05 | 北京小米移动软件有限公司 | Bending battery structure |
| CN113232376A (en) * | 2021-04-30 | 2021-08-10 | 江汉大学 | Preparation method of outer packaging film and flexible battery |
-
2019
- 2019-01-31 CN CN201920175276.1U patent/CN209401729U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713207A (en) * | 2019-01-31 | 2019-05-03 | 柔电（武汉）科技有限公司 | A kind of flexible battery and tab optimization technique of tab optimization |
| CN111244338A (en) * | 2020-04-27 | 2020-06-05 | 北京小米移动软件有限公司 | Bending battery structure |
| CN113232376A (en) * | 2021-04-30 | 2021-08-10 | 江汉大学 | Preparation method of outer packaging film and flexible battery |
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Effective date of registration: 20230524 Address after: 430070 Room 01, Floor 4, Building 4, Phase III, Wuhan Optics Valley Electronics Industrial Park, No. 28, Gaoxin 4th Road, Fozuling Street, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee after: ROUDIAN (WUHAN) TECHNOLOGY CO.,LTD. Address before: 430000 Optics Valley road 303, Optics Valley New Technology Development Zone, Wuhan, Hubei. Room 402, 2-03 402, core center, Optics Valley. Patentee before: ROUDIAN (WUHAN) TECHNOLOGY CO.,LTD. Patentee before: SHENZHEN SOFT POWER TECHNOLOGY Co.,Ltd. |