CN208127308U - A kind of electrodes of lithium-ion batteries - Google Patents
A kind of electrodes of lithium-ion batteries Download PDFInfo
- Publication number
- CN208127308U CN208127308U CN201820438580.6U CN201820438580U CN208127308U CN 208127308 U CN208127308 U CN 208127308U CN 201820438580 U CN201820438580 U CN 201820438580U CN 208127308 U CN208127308 U CN 208127308U
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- Prior art keywords
- lithium
- electrodes
- ion batteries
- tab
- notch
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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
Abstract
The utility model embodiment discloses a kind of electrodes of lithium-ion batteries comprising tab and dressing region open up on the tab jagged, and the notch extends to the dressing region；At least two column circular protrusions are also evenly arranged on the tab.The utility model embodiment provides a kind of electrodes of lithium-ion batteries, and structure is simple, is easy to make, and goes out notch by the tab cutting in pole piece to discharge stress, effectively improves the situation of pole piece inner tensions unevenness, and then improve the yields of electric core winding；And by the way that circular protrusions are arranged on tab, further improve the yields of battery core.
Description
Technical field
The utility model belongs to lithium ion power battery technology field, and in particular to a kind of electrodes of lithium-ion batteries.
Background technique
The market competition of the following pure electric automobile will grow in intensity, and determine that the key of its success or failure is then its core
Part --- lithium-ion-power cell；Following electric vehicle industry, what is be not eliminated will can remain lithium ion battery
Performance is constantly promoted and enterprise that battery price constantly declines；Firstly, lithium-ion-power cell is with high costs to lead to electric car
Price it is higher, increase the universal market difficulty of electric car；On the other hand, lithium ion battery core material such as positive electrode
Diaphragm, electrolyte and flexible packaged battery core the heavy dependences import such as aluminum plastic film, lead to the lithium ion battery cost of manufacture
It holds at high price；Therefore, battery producer needs are constantly brought forth new ideas in terms of production management and manufacturing process, to guarantee product product
Under the premise of matter, production efficiency and yields are improved.
Currently, the process flow of lithium-ion-power cell is since stirring prepares positive and negative electrode slurry, by coating, roll-in
With the finished product pole piece for obtaining meeting battery design size after cutting；Wherein, the pole piece effect of being under pressure has occurred in nipping process
Serious deformation, and it is left white that area is different with the degree of stretch in area is expected to cause that internal tension after pole piece roll-in is uneven, and tension is not
The tightness that deflector roll is crossed in equal pole piece two sides is different, can be partial to during coiling battery core tight side offset so as to cause
Battery core spiral, the problem are the main reason for causing winding procedure of battery fraction defective high, and directly influence the cost of battery
Control.
Utility model content
The purpose of the utility model is to provide a kind of electrodes of lithium-ion batteries, solve lithium-ion electric existing in the prior art
The problem of pond pole piece tension unevenness.
Technical solution used by the utility model is：
A kind of electrodes of lithium-ion batteries comprising tab and dressing region open up jagged, the notch on the tab
Extend to the dressing region；At least two column circular protrusions are also evenly arranged on the tab.
The utility model is also characterized by：
The notch is isosceles trapezoid.
The base angle angle of the isosceles trapezoid is 30~45 °；Each base angle of the isosceles trapezoid is provided with fillet.
The length on shorter bottom edge is the 1/4~1/3 of dressing peak width in the isosceles trapezoid.
The depth that the notch extends to the dressing region is more than or equal to 0.5mm.
Circular protrusions described in each column are at least uniformly arranged three.
Circular protrusions described in each column are arranged along the vertical direction.
Circular protrusions described in each column are arranged along the direction parallel with the bevel edge of notch.
The circular protrusions and notch interleaved are arranged.
The tab is continuous setting, and the height of the tab is 8~12mm.
Compared with prior art, the utility model embodiment provides a kind of electrodes of lithium-ion batteries, and structure is simple, production is held
Easily, notch is gone out to discharge stress by the tab cutting in pole piece, effectively improves the situation of pole piece inner tensions unevenness, in turn
Improve the yields of electric core winding；And by the way that circular protrusions are arranged on tab, further improve the yields of battery core.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram one of electrodes of lithium-ion batteries of the utility model embodiment；
Fig. 2 is a kind of structural schematic diagram two of electrodes of lithium-ion batteries of the utility model embodiment；
Fig. 3 is that adjacent gap cuts spacing schematic diagram in a kind of the utility model embodiment electrodes of lithium-ion batteries；
Fig. 4 is the shape of tool that die-cutting machine used in notch is cut in a kind of electrodes of lithium-ion batteries of the utility model embodiment
Schematic diagram；
Fig. 5 is that extension size of the notch in dressing region is illustrated in a kind of electrodes of lithium-ion batteries of the utility model embodiment
Figure.
In figure, 1. tabs, 11. circular protrusions, 2. dressing regions, 3. notches, 4. cutter of die cutting machine.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail；It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The utility model embodiment provides a kind of electrodes of lithium-ion batteries, as shown in Figure 1 comprising pole piece ontology, pole piece
Ontology includes tab 1 and dressing region 2, jagged 3 is opened up on the tab 1, the notch 3 extends to the dressing region 2；
At least two column circular protrusions 11 are also evenly arranged on the tab 1.
The notch 3 is isosceles trapezoid；The base angle angle of the isosceles trapezoid is 30~45 °；The isosceles trapezoid it is every
A base angle is provided with fillet；The length on shorter bottom edge is the 1/4~1/3 of 2 width of dressing region in the isosceles trapezoid；It is described
The depth that notch 3 extends to the dressing region 2 is more than or equal to 0.5mm.
Each column circular protrusions 11 are at least uniformly arranged three；As shown in Figure 1, the first embodiment that circular protrusions 11 arrange
For：Each column circular protrusions 11 are arranged along the vertical direction；As shown in Fig. 2, second of embodiment that circular protrusions 11 arrange is：Often
Column circular protrusions 11 are arranged along the direction parallel with the bevel edge of notch 3.In addition, circular protrusions 11 can also be spaced with notch 3
It is staggered, that is, a notch 3 is set, then a column circular protrusions 11 are set, then a notch 3 is arranged, so arrange.
Signified pole piece is continuous coating pole piece in a kind of electrodes of lithium-ion batteries of the utility model embodiment, is passed through first
The standby positive and negative electrode pole piece needed of roll pressing, then filters out tension unevenness degree serious pole piece during battery core coiling,
Finally cut out the notch 3 of release stress in its tab 1 using cutting means to the pole piece, notch 3 extends to dressing region
2, and at least two column circular protrusions 11 are evenly arranged on tab 1；The tab 1 of the pole piece is continuous setting, the pole
The height of ear 1 is 8~12mm；The cutting means are die-cutting machine.
As Figure 1-Figure 4, the shape of the notch 3 is isosceles trapezoid；The base angle angle R of the isosceles trapezoid is by being die cut
The a angle of rounding machine cutter 4 limits, and the zone of reasonableness of the angle is 30~45 °；Each base angle of the isosceles trapezoid is provided with circle
Angle R2, R2 are preferably arranged to 2mm；The length L4 on shorter bottom edge is 2 width L2's of pole piece dressing area in the isosceles trapezoid
1/4~1/3；The depth L6 that the notch 3 extends to the dressing region 2 is more than or equal to 0.5mm；Cut the shape ruler of notch 3
Very little to be determined by the shape of tool of die-cutting machine, cutter of die cutting machine effectively cuts height L1 of the height L5 greater than the tab 2 of pole piece.Institute
State die-cutting machine working method be it is intermittent cut, can by control die-cutting machine intermittent time come control adjacent gap 3 it
Between cut spacing L3.Adjacent gap 3 cut the spacing L3 threading for crossing roller adjacent less than or equal to any pair on up- coiler away from
From.
Finally, the improvement of pole piece tension can be verified by rolling step；In the present embodiment, the abnormal pole isolated
After piece processing, the serpentine bend of 1 meter of length pole piece of unit can be controlled within 2mm, pole piece is between the adjacent deflector roll of up- coiler
Flatness significantly improves, and the spiral for eliminating coiling battery core again is abnormal.The utility model by being cut to pole-piece pole-ear,
Internal stress caused by roll-in is discharged at gap position in advance, to alleviate the serpentine bend of pole piece, Jin Erti
The high yields of electric core winding；At least two column circular protrusions 11 are uniformly arranged on tab 1,11 one side of circular protrusions can
Play the role of reinforcing 1 intensity of tab, improves the non-deformability of tab 1；On the other hand, when pole piece in winding process by
When tension, tension acts in multiple circular protrusions simultaneously, so that tab 1 deforms and turns down damaged ratio and reduces, into
One step improves the yields of battery core.
Claims (10)
1. a kind of electrodes of lithium-ion batteries, which is characterized in that it includes tab and dressing region, is offered on the tab scarce
Mouthful, the notch extends to the dressing region；At least two column circular protrusions are also evenly arranged on the tab.
2. a kind of electrodes of lithium-ion batteries according to claim 1, which is characterized in that the notch is isosceles trapezoid.
3. a kind of electrodes of lithium-ion batteries according to claim 2, which is characterized in that the base angle angle of the isosceles trapezoid
It is 30~45 °；Each base angle of the isosceles trapezoid is provided with fillet.
4. a kind of electrodes of lithium-ion batteries according to claim 2, which is characterized in that shorter bottom edge in the isosceles trapezoid
Length be dressing peak width 1/4~1/3.
5. a kind of electrodes of lithium-ion batteries described in any one of -4 according to claim 1, which is characterized in that the notch extends
Depth to the dressing region is more than or equal to 0.5mm.
6. a kind of electrodes of lithium-ion batteries described in any one of -4 according to claim 1, which is characterized in that circle described in each column
Protrusion is at least uniformly arranged three.
7. a kind of electrodes of lithium-ion batteries described in any one of -4 according to claim 1, which is characterized in that circle described in each column
Protrusion is arranged along the vertical direction.
8. a kind of electrodes of lithium-ion batteries according to any one of claim 2-4, which is characterized in that circle described in each column
It is raised to be arranged along the direction parallel with the bevel edge of notch.
9. a kind of electrodes of lithium-ion batteries described in any one of -4 according to claim 1, which is characterized in that the circular protrusions
It is arranged with notch interleaved.
10. a kind of electrodes of lithium-ion batteries described in any one of -4 according to claim 1, which is characterized in that the tab is
Continuous setting, the height of the tab are 8~12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820438580.6U CN208127308U (en) | 2018-03-29 | 2018-03-29 | A kind of electrodes of lithium-ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820438580.6U CN208127308U (en) | 2018-03-29 | 2018-03-29 | A kind of electrodes of lithium-ion batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208127308U true CN208127308U (en) | 2018-11-20 |
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ID=64193330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820438580.6U Active CN208127308U (en) | 2018-03-29 | 2018-03-29 | A kind of electrodes of lithium-ion batteries |
Country Status (1)
| Country | Link |
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| CN (1) | CN208127308U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817875A (en) * | 2019-03-01 | 2019-05-28 | 湖北锂诺新能源科技有限公司 | Porous lightweight battery core of wedge shape and preparation method thereof |
-
2018
- 2018-03-29 CN CN201820438580.6U patent/CN208127308U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817875A (en) * | 2019-03-01 | 2019-05-28 | 湖北锂诺新能源科技有限公司 | Porous lightweight battery core of wedge shape and preparation method thereof |
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