CN206789615U - Pole piece and battery core - Google Patents
Pole piece and battery core Download PDFInfo
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- CN206789615U CN206789615U CN201720671205.1U CN201720671205U CN206789615U CN 206789615 U CN206789615 U CN 206789615U CN 201720671205 U CN201720671205 U CN 201720671205U CN 206789615 U CN206789615 U CN 206789615U
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- pole piece
- group
- raised
- lug
- bearing
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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 application is related to pole piece and battery core.Pole piece includes pole piece body and at least one lug for extending from the pole piece body, includes multiple dot bulges being intervally arranged formed with raised group, the raised group at least one lug.On the one hand, the dot bulge improves lug resistance to deformation and the ability destroyed；On the other hand, when pole piece in winding process by tension force when, the tension force can act in multiple dot bulges simultaneously, because the size of dot bulge in all directions is more or less the same, and the dot bulge of closed outline is respectively provided with the effect for strengthening lug intensity in all directions, it is upwardly-deformed that one side only occurs under tension for dot bulge, in other directions then deflection very little, it is even indeformable, the deformation in one direction can not be fully deployed the projective structure of dot bulge, it can thus be appreciated that, lug deforms, the ratio of turnover and breakage reduces, improve the yields of battery core.
Description
Technical field
The application is related to energy storage device technical field, more particularly to a kind of pole piece and battery core.
Background technology
At present, in order to improve the charge-discharge performance of secondary cell, generally use multi pole ears technology, i.e. in positive plate and negative
Multiple anode ears and multiple negative electrode lugs are respectively cut out on pole piece, after positive plate and negative plate are wound or are stacked, Duo Gezheng
Lug forms stepped construction, and multiple negative electrode lugs form stepped construction.
However, because collector is mostly using the super thin metal foils such as copper foil of the thickness less than 10um, aluminium foil, its intensity pole
It is low.After lug excision forming, during tape transport crosses roller, there is the phenomenon of the problems such as deformation, turn down, be damaged very in lug
Seriously, the fraction defective of battery core is thus caused to increase therewith.
Utility model content
This application provides a kind of pole piece and battery core, lug can be significantly reduced and deform, turn down and damaged ratio
Rate, improve the yields of battery core.
The first aspect of the application provides a kind of pole piece, including pole piece body and from the pole piece body extend to
A few lug, formed with raised group at least one lug, it is convex that the raised group includes multiple point-like being intervally arranged
Rise.
Preferably, the dot bulge in each raised group is linearly arranged, at least one described convex
The bearing of trend for playing group is parallel with the bearing of trend of raised group another described.
Preferably, the bearing of trend of each raised group is mutually parallel.
Preferably, along the arragement direction of multiple raised groups, multiple raised groups form one group, two adjacent groups it
Between it is spaced,
The interval is more than the interval in same group between the raised group of arbitrary neighborhood two.
Preferably, the bearing of trend of each raised group and the lug are from the direction one that the pole piece body extends
Cause.
Preferably, the dot bulge in each raised group is linearly arranged, at least one described convex
Play the bearing of trend of group and form non-zero included angle with the bearing of trend of another raised group.
Preferably, the dot bulge formed in each raised group of non-zero included angle is relative two-by-two.
Preferably, the bearing of trend of each raised group in multiple raised one group, same group of groups' compositions is parallel,
Along the bearing of trend perpendicular to the lug, the bearing of trend of raised group described in two adjacent groups forms non-zero included angle.
Preferably, the lug includes the head and root being connected, and the root is connected with the pole piece body, described
Head includes the first corner and the second corner being oppositely arranged along the bearing of trend perpendicular to the lug,
At least one raised group delay extends first corner, and/or at least one raised group delay extends institute
State the second corner.
The second aspect of the application provides a kind of battery core, including positive plate and negative plate, the positive plate and described negative
At least one of pole piece is the pole piece described in any of the above-described.
The technical scheme that the application provides can reach following beneficial effect：
This application provides a kind of pole piece, the lug in the pole piece includes raised group, and raised group includes multiple be intervally arranged
Dot bulge, on the one hand, the setting of the dot bulge serve strengthen lug intensity effect, improve lug resistance to deformation
With the ability of destruction；On the other hand, when pole piece in winding process by tension force when, the tension force can act on multiple point-like simultaneously
In projection, because the size of dot bulge in all directions is more or less the same, and the dot bulge of closed outline is in all directions
The effect for strengthening lug intensity is respectively provided with, therefore, when bearing of trend of the tension force along pole piece body acts on each dot bulge,
The dot bulge only deformation in one direction of generation under tension, the deflection very little in other directions, in addition it is indeformable, one
The deformation in individual direction can not be fully deployed the projective structure of dot bulge, it follows that the booster action of dot bulge will not
It is wholly absent, this causes dot bulge still to play a part of strengthening the intensity of lug under tension, and then causes
Lug deforms, turn down and damaged ratio reduces, and improves the yields of battery core.
It should be appreciated that the general description and following detailed description of the above are only exemplary, this can not be limited
Application.
Brief description of the drawings
Fig. 1 is the schematic diagram of the raised group that the embodiment of the present application provides and dot bulge；
Fig. 2 provides the schematic diagram for being provided with multiple raised groups for the embodiment of the present application；
Fig. 3 is one of them raised group of the embodiment of the present application offer schematic diagram parallel with another raised faciation；
Fig. 4 is the schematic diagram for each raised group's parallel arrangement that the embodiment of the present application provides；
Spaced schematic diagram between the adjacent raised group that Fig. 5 provides for the embodiment of the present application；
Fig. 6 is one of them raised group that the embodiment of the present application provides and another raised group is in the signal of non-zero included angle
Figure；
Fig. 7 is the schematic diagram for the raised group that the embodiment of the present application provides.
Reference：
1- pole pieces；
11- pole piece bodies；
12- lugs；
12a- heads；
The corners of 12aa- first；
The corners of 12ab- second；
12b- roots；
121- projection groups；
1211- dot bulges；
121 '-raised group.
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the application
Example, and be used to together with specification to explain the principle of the application.
Embodiment
The application is described in further detail below by specific embodiment and with reference to accompanying drawing.
As shown in figure 1, this application provides a kind of pole piece 1, the pole piece 1 is commonly used to manufacture battery core, as in battery core
Collector.Pole piece 1 generally comprises positive plate and negative plate, and positive plate and negative plate include active material layer, positive plate, born respectively
Pole piece is separated by barrier film, and three is processed into naked battery core by way of winding or being stacked, when naked battery core is infiltrated in electrolyte
When interior, active material and electrolyte contacts, now, chemical energy is converted to electric energy.
It should be noted that the application is that positive plate or negative plate are not construed as limiting to pole piece 1, pole piece 1 can be understood as
At least one of positive plate and negative plate.
Specifically, pole piece 1 includes pole piece body 11 and the lug 12 extended from pole piece body 11, wherein, pole piece body
The part of active material layer is not coated with 11 can be used as lug 12, and each pole piece body 11 can include one or more poles
Ear 12, when including multiple lugs 12, raised group 121 can be formed at least one lug 12, the raised group 121 includes
Multiple dot bulges 1211 being intervally arranged.
Description more than, on the one hand, the setting of the dot bulge 1211 serves the intensity effect for strengthening lug 12,
So as to the ability for improving the resistance to deformation of lug 12 and destroying；On the other hand, when pole piece 1 in winding process by tension force when,
The tension force can act in multiple dot bulges 1211 simultaneously, due to the size difference of dot bulge 1211 in all directions not
Greatly, and closed outline dot bulge 1211 all directions be respectively provided with strengthen the intensity of lug 12 effect, therefore, when tension force edge
When the bearing of trend of pole piece body 11 and acting on each dot bulge 1211, dot bulge 1211 only occurs one under tension
The deformation in individual direction, the deflection very little in other directions, in addition it is indeformable, the deformation in a direction can not make dot bulge
1211 projective structure is fully deployed, it follows that the booster action of dot bulge 11 will not be wholly absent, this make it that point-like is convex
The intensity for strengthening lug 2 can still be played under tension by playing 1211, and then cause lug 12 to deform, turn over
Folding and the ratio of breakage reduce, and improve the yields of battery core.
As shown in Fig. 2 the application is not construed as limiting to the arrangement mode of raised group 121, each raised group 121 can be with any appearance
State is formed on lug 12, in addition, the quantity of the dot bulge 1211 in each raised group 121 can also be big according to specific space
Small selection is set.
A kind of embodiment, as shown in figure 3, the dot bulge 1211 in each raised group 121 is linearly arranged, extremely
The bearing of trend of a few raised group 121 is parallel with the bearing of trend of another raised group 121.In the embodiment, each projection
Group 121 is arranged in a manner of being parallel to each other and can save space, on lug 12 of the same area, can increase dot bulge 1211
Quantity so that lug 12 has higher intensity.
Still optionally further, as shown in figure 4, the bearing of trend of each raised group 121 is mutually parallel, what is be parallel to each other is each convex
Rise group 121 can bigizationner using the space on lug 12, further increase the quantity of dot bulge 1211 on lug 12,
So as to further improve the intensity of lug 12.
In addition, in some other embodiment, as shown in figure 5, along the arragement direction of multiple raised groups 121 (in Fig. 5
X-direction), one group can be formed with multiple raised groups 121, spaced D between two adjacent groups, and the interval D is more than same group
Interval d between the middle raised group 121 of arbitrary neighborhood two.After being arranged such, the dot bulge 1211 that is formed on lug 12
Quantity reduces, and correspondingly, simplifies and is used for the quantity for processing the corresponding structure of the dot bulge 1211 on tool, thus reduce
Difficulty of processing.In the present embodiment, dot bulge 1211 can process to be formed by way of roll-in.The size of interval D can be with
Chosen between 0.1mm~100mm.
In the embodiment shown in fig. 5, each two projection group 121 forms one group, and six raised groups 121 form three groups altogether.
But burst mode is not limited only to the situation shown in Fig. 5, it can also be that three raised groups 121 form one group, six projections
Group 121 forms two groups altogether；Or the quantity of raised group 121 can be more, more raised groups 121 form more multigroup.
It is selectable in the embodiment that the bearing of trend of above-mentioned each raised group 121 is parallel to each other, can also further it set
Bearing of trend and the lug 12 for putting each raised group 121 are consistent from the direction that pole piece body 11 extends (Y-direction in Fig. 5).By
In lug 12 be usually square structure, after being arranged such, along the stretching direction of lug 12, at each position of lug 12,
The quantity of dot bulge 1211 can be equal, so that when pole piece 1 is by tension force, the stress phase of the position of lug 12
To more uniformly, avoiding the occurrence of stress concentration phenomenon.
In some other embodiment, as shown in fig. 6, the dot bulge 1211 in each raised group 121 is along straight line side
To arrangement, the bearing of trend of at least one raised group 121 forms non-zero included angle with the bearing of trend of another raised group 121, should
The angle value of non-zero included angle could be arranged to the arbitrary value between 0 °~90 °.Each 121 angled setting of raised group, can cause
The set direction of the raised position of tension force according to suffered by lug 12 of group 121 sets the posture of raised group 121, so as to pass through
The raised group 121 of lesser amt is set to realize the purpose of the intensity of larger raising lug 12.
In the embodiment shown in fig. 6, the 1211 liang of two-phases of each dot bulge formed in each raised group 121 of non-zero included angle
It is right.Each dot bulge 1211 facing each other can avoid each point-like with Relatively centralized in a certain region of lug 12
The position of projection 1211 is more scattered, causes each dot bulge 1211 can not form phenomenon with joint efforts in bearing tension force.
Further, continuing with referring to Fig. 6, multiple raised groups 121 can also be formed one group, and set each in same group
The bearing of trend of raised group 121 is parallel, and edge is perpendicular to the bearing of trend of lug 12, the extension of two adjacent groups projection group 121
Direction forms non-zero included angle.This setting can cause each raised group 121 to form netted lines, and more random and scattered setting is convex
For playing group 121, its structure is compacter, and the effect for undertaking tension force suffered by pole piece 1 is more preferable.
In the embodiment shown in fig. 6, two raised groups 121 form one group, in some other embodiment, form same
The quantity of the raised group 121 of group can also be three or more.
As shown in fig. 7, the consistent raised group 121 of two bearing of trends can also be configured to one group of raised group 121 '
It is arranged to multiple, multiple raised groups 121 ' are divided into first group and second group, wherein, each raised group's 121 in first group prolongs
It is consistent to stretch the bearing of trend for each raised group 121 that direction is consistent, in second group, each raised group 121 ' arranges in determinant,
On the bearing of trend of lug 12, two neighboring raised group 121 ' is respectively formed non-zero included angle.
Continuing with referring to Fig. 7, lug 12 includes the head 12a and root 12b being connected, wherein, root 12b and pole piece sheet
Body 11 connects, and head 12a stretches out from root 12b, in the winding process of pole piece 1, head 12a relative to root 12b more
Easily turnover and breakage under tension, considers this factor, sets at least one raised group 121 extending to head 12a
Place.
Specifically, head 12a is included along the first corner 12aa for being oppositely arranged of bearing of trend perpendicular to lug 12 and the
Two corner 12ab, at least one raised group 121 extend to the first corner 12aa；Or at least one raised group 121 extends to
Two corner 12ab；Or each raised group 121 extends respectively to the first corner 12aa and second angle 12ab.
In the application, dot bulge 1211 can also be molded on lug 12 by way of punching press, and dot bulge
1211 shape can be not limited only to the circular dot bulge 1211 in above-described embodiment, may be arranged as square, oval
Shape and the dot bulge of polygon 1211.It need to particularly point out, dot bulge 1211 is the projective structure for having certain area.
When dot bulge 1211 is provided in round structure, the radius of dot bulge 1211 can 0.1mm~50mm it
Between choose.
The second aspect of the application additionally provides a kind of battery core, and the battery core includes positive plate and negative plate, wherein, positive plate
It is the pole piece 1 in any of the above-described embodiment with least one of negative plate.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
- A kind of 1. pole piece, it is characterised in that at least one lug extended including pole piece body and from the pole piece body, extremely Include multiple dot bulges being intervally arranged formed with raised group, the raised group on a few lug.
- 2. pole piece according to claim 1, it is characterised in that the dot bulge in each raised group is along straight Line direction is arranged, and the bearing of trend of at least one raised group is parallel with the bearing of trend of raised group another described.
- 3. pole piece according to claim 2, it is characterised in that the bearing of trend of each raised group is mutually parallel.
- 4. pole piece according to claim 3, it is characterised in that along the arragement direction of multiple raised groups, Duo Gesuo Raised one group of group's composition is stated, it is spaced between two adjacent groups,The interval is more than the interval in same group between the raised group of arbitrary neighborhood two.
- 5. according to the pole piece described in claim any one of 2-4, it is characterised in that the bearing of trend of each raised group with it is described Lug is consistent from the direction that the pole piece body extends.
- 6. pole piece according to claim 2, it is characterised in that the dot bulge in each raised group is along straight Line direction is arranged, and the bearing of trend of at least one raised group forms non-zero folder with the bearing of trend of another raised group Angle.
- 7. pole piece according to claim 6, it is characterised in that the point formed in each raised group of non-zero included angle Shape projection is relative two-by-two.
- 8. pole piece according to claim 7, it is characterised in that multiple raised groups form each in one group, same group The bearing of trend of the raised group is parallel, and along the bearing of trend perpendicular to the lug, raised group's prolongs described in two adjacent groups Stretch direction and form non-zero included angle.
- 9. according to the pole piece described in claim any one of 1-4 and 6-8, it is characterised in that the lug includes the head being connected Portion and root, the root are connected with the pole piece body, and the head is included along the bearing of trend phase perpendicular to the lug To the first corner and the second corner of setting,At least one raised group delay extends first corner, and/or at least one raised group delay extends described Two corners.
- 10. a kind of battery core, including positive plate and negative plate, it is characterised in that in the positive plate and the negative plate at least One is the pole piece any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720671205.1U CN206789615U (en) | 2017-06-09 | 2017-06-09 | Pole piece and battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720671205.1U CN206789615U (en) | 2017-06-09 | 2017-06-09 | Pole piece and battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206789615U true CN206789615U (en) | 2017-12-22 |
Family
ID=60716887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720671205.1U Active CN206789615U (en) | 2017-06-09 | 2017-06-09 | Pole piece and battery core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206789615U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728358A (en) * | 2018-11-14 | 2019-05-07 | 中航锂电（洛阳）有限公司 | A kind of winding method of electric core of square secondary cell |
| CN113346198A (en) * | 2020-02-17 | 2021-09-03 | 东莞新能安科技有限公司 | Electrode lug and battery cell applying same |
-
2017
- 2017-06-09 CN CN201720671205.1U patent/CN206789615U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728358A (en) * | 2018-11-14 | 2019-05-07 | 中航锂电（洛阳）有限公司 | A kind of winding method of electric core of square secondary cell |
| CN113346198A (en) * | 2020-02-17 | 2021-09-03 | 东莞新能安科技有限公司 | Electrode lug and battery cell applying same |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |