CN110197893A - Pole piece, battery core and battery modules - Google Patents
Pole piece, battery core and battery modules Download PDFInfo
- Publication number
- CN110197893A CN110197893A CN201910531539.2A CN201910531539A CN110197893A CN 110197893 A CN110197893 A CN 110197893A CN 201910531539 A CN201910531539 A CN 201910531539A CN 110197893 A CN110197893 A CN 110197893A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- paillon
- coating
- height
- recessed area
- Prior art date
- 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.)
- Pending
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
-
- 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
Abstract
The invention discloses a kind of pole piece, battery core and battery modules, are related to field of batteries, to optimize the structure of pole piece.The pole piece includes paillon and coating.Paillon is equipped with recessed area and empty foil region along width direction.In the short transverse of paillon, the height of the first surface in empty foil region is higher than the second surface height of recessed area.Coating is set to recessed area.The pole piece that above-mentioned technical proposal provides, in follow-up roller compressed tablets, the side entire surface that the degree of coating area deformation is less than paillon setting coating uses deformation extent when plane, therefore improves the pole piece quality that roll-in film-making obtains, and also improves the quality of subsequent battery modules obtained.
Description
Technical field
The present invention relates to field of batteries, and in particular to a kind of pole piece, battery core and battery modules.
Background technique
Full tab pole piece includes slurry applying area and the area Kong Bo.In the prior art, slurry is coated on foil surfaces, then
Roll-in film-making obtains required pole piece.
Inventors have found that at least there are following problems in the prior art: in roll-in film-making, after the roll-in of slurry applying area
Length is larger, and the length after the roll-in of the area Kong Bo is shorter.This results in the irregular structure of pole piece after roll-in, and subsequent winding forms electricity
Chi Shi, battery quality are bad.
Summary of the invention
The present invention proposes a kind of pole piece, battery core and battery modules, to optimize the structure of pole piece.
The present invention provides a kind of pole pieces, comprising:
Paillon is equipped with recessed area and empty foil region along the width direction of the paillon；Along the height of the paillon
Direction, the height of the first surface in the sky foil region are higher than the height of the second surface of the recessed area；And
Coating is set to the recessed area.
In some embodiments, the coating includes third surface, and the third surface deviates from the second surface；Institute
It states in the short transverse of paillon, third surface is concordant with the first surface.
In some embodiments, the coating includes third surface, and the third surface deviates from the second surface；Institute
It states in the short transverse of paillon, the first surface is lower than the third surface.
In some embodiments, in the short transverse of the paillon, the first surface is close to the coating side
Height is higher than the height away from the side of the coating.
In some embodiments, the first surface is inclined.
In some embodiments, the recessed area extends into the other side from the side of the length direction of the paillon.
In some embodiments, the side of length direction of the empty foil region from the paillon extends into the other side.
In some embodiments, the pole piece includes full tab pole piece.
Another embodiment of the present invention provides a kind of battery cores, including pole piece provided by any technical solution of the present invention.
Another embodiment of the present invention provides a kind of battery modules, including battery core provided by any technical solution of the present invention.
The pole piece that above-mentioned technical proposal provides, paillon are located at the whole surface not instead of plane of coating side, have
Height has low.Empty foil region corresponds to the higher-height position of paillon；Recessed area is correspondingly arranged the position of coating, and height is lower.
Height of the above-mentioned pole piece due to increasing sky foil region, so that the first surface in empty foil region is higher than interior when uncoated coating
The second surface of concave region.After subsequent Coating, the third surface of coating is concordant with the first surface height in empty foil region,
Or the third surface of coating is higher than the first surface height in empty foil region.In follow-up roller compressed tablets, coating area deformation
The side entire surface that degree is less than paillon setting coating uses deformation extent when plane, therefore improves what roll-in film-making obtained
Pole piece quality also improves subsequent battery quality obtained.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is pole piece schematic perspective view provided in an embodiment of the present invention；
Fig. 2 is pole piece schematic view of the front view provided in an embodiment of the present invention；
Fig. 3 is the pole piece left view enlarged structure schematic diagram that some embodiments of the invention provide；
Fig. 4 is the pole piece left view enlarged structure schematic diagram that other embodiments of the invention provide；
Fig. 5 is the pole piece left view enlarged structure schematic diagram that yet other embodiments of the invention provides.
Specific embodiment
Technical solution provided by the invention is illustrated in more detail below with reference to FIG. 1 to FIG. 5.
Battery includes anode pole piece, cathode pole piece and diaphragm.Diaphragm is set between anode pole piece, cathode pole piece.
Anode pole piece, cathode pole piece all include the coating 2 of paillon 1 and the first surface 121 set on paillon 1.Below in detail
Carefully introduce the structure of pole piece.It says that the pole piece of introduction is suitable for anode pole piece hereinafter, is also applied for cathode pole piece.Anode pole piece,
1 material of paillon used by cathode pole piece is same or different.2 material of coating used by anode pole piece, cathode pole piece is identical
Or it is different.
Referring to Fig. 1, Fig. 3 to Fig. 5, the embodiment of the present invention provides a kind of pole piece, including paillon 1 and coating 2.1 edge of paillon
Width direction B be equipped with recessed area 11 and empty foil region 12.In the short transverse of paillon 1, first table in empty foil region 12
The height in face 121 is higher than the height of the second surface 111 of recessed area 11.Coating 2 is set to recessed area 11.
Referring to Fig. 1 and Fig. 2, the length direction of pole piece is as shown by arrow A.The length direction is also 11 He of recessed area hereinafter
The length direction in empty foil region 12.Arrow B illustrates the width direction of pole piece.
Along the width direction B of pole piece, pole piece is divided into two regions: recessed area 11 and empty foil region 12.Recessed area
11 are equipped with coating 2.
Referring to Fig. 3 to Fig. 5, on the short transverse C of paillon 1, with face on the right side for " surface ", it is with the face by left side
" bottom surface ".The area Kong Bo 12 includes opposite first surface 121 and the first bottom surface 122.Recessed area 11 includes the second opposite table
Face 111 and the second bottom surface 112.Coating 2 includes opposite third surface 21 and third bottom surface 22.Third bottom surface 22 and second surface
111 fittings.
Referring to Fig. 1 and Fig. 3, first surface 121, second surface 111 are located at the same side of 1 short transverse C of paillon.
Referring to Fig. 3 to Fig. 5, on the short transverse C of paillon 1, what the first bottom surface 122 and the second bottom surface 112 were generally flush with.
The pole piece that above-mentioned technical proposal provides, paillon 1 are located at the whole surface of 2 side of coating not in short transverse C
It is plane, but there have height to have to be low, is in other words ladder-like.The corresponding higher-height position of paillon 1 in empty foil region 12；Recessed area
11 are correspondingly arranged the position of coating 2, and height is lower.Due to increasing the height in sky foil region 12, so that uncoated coating 2
When, the first surface 121 in empty foil region 12 is higher than the second surface 111 of recessed area 11.After subsequent Coating 2, coating 2
Third surface 21 with the 121 concordant or coating 2 third surface 21 of height of first surface in empty foil region 12 higher than the area Kong Bo
121 height of first surface in domain 12.In follow-up roller compressed tablets, the degree of 2 region deformation of coating is less than 1 whole surface of paillon and adopts
Deformation extent when with plane, applying area and uncoated area's intersection stress, painting when reducing pole piece roll-in when slowing down roll-in
The fold in cloth area and uncoated area's intersection, improves the degree of irregularity of pole piece integral edge, reduces the disconnected band of thickness pole piece
Risk, therefore the pole piece quality that roll-in film-making obtains is improved, be conducive to subsequent rolling step, also reduce battery and integrally answer
Power improves the quality of subsequent battery modules obtained.So-called pole piece breaks band, refers to that pole piece is broken.
Referring to Fig. 3, in some embodiments, third surface 21 is concordant with first surface 121.
The subsequent of coating 2 needs to be calculated in practical manufacturing process.When painting work, by the painting for adjusting coating machine
Roller operates to control 2 thickness of coating.
Referring to Fig. 1 and Fig. 2, in some embodiments, recessed area 11 is extended into from the side of the length direction A of paillon 1
The other side.
Referring to Fig. 1 and Fig. 2, in some embodiments, empty foil region 12 is extended into from the side of the length direction A of paillon 1
The other side.
In some embodiments, pole piece specifically includes full tab pole piece.
Several specific implementations in sky foil region 12 are described below.
Referring to Fig. 3, in some embodiments, on the short transverse C of paillon 1, be arranged coating 2 after, first surface 121 with
Third surface 21 is substantially flush, and sky foil and the empty foil stress under the slurry of applying area are almost the same at when roll-in uncoated area.At this time
The stress suffered by applying area and uncoated area's intersection has larger improvement using the structure of plane compared to paillon 1, and stress reduces
The fold then generated also accordingly slows down therewith, and the fan-shaped spiral of pole piece entirety can also be improved, and improves roll-in quality, improves
Battery total quality.
Referring to fig. 4, in some embodiments, on the short transverse C of paillon 1, first surface 121 is close to 2 side of coating
Height be higher than away from coating 2 side height.
Specifically, first surface 121 is inclined, stair-stepping, irregular shape or curve shape.
Referring to fig. 4, empty foil region 12 is located at may be largely trapezoidal in shape for 2 end of coating, it is trapezoidal also have slow down stress
Effect.
Referring to Fig. 5, in some embodiments, on the short transverse C of paillon 1, first surface 121 is lower than third surface
21。
Referring to Fig. 5, empty foil region 12 is located at the substantially rectangular in shape or irregular shape of 2 end of coating, above-mentioned shape
Shape also has the function of slowing down stress.
Another embodiment of the present invention provides a kind of battery cores, including pole piece provided by any technical solution of the present invention.
Pole piece using the above structure, then according to the manufacturing processing technic roll-in film-making of battery modules, finally obtains required
The battery core wanted.
Another embodiment of the present invention provides a kind of battery modules, including battery core provided by any technical solution of the present invention.
Multiple battery cores are assembled and are processed, battery modules are obtained.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is only the present invention and simplified description for ease of description, rather than indicates or imply signified device
Or element must have a particular orientation, construct and operate for specific orientation, thus should not be understood as in present invention protection
The limitation of appearance.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
But these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of pole piece characterized by comprising
Paillon (1) is equipped with recessed area (11) and empty foil region (12) along the width direction of the paillon (1)；In the foil
In the short transverse of piece (1), the height of the first surface (121) of the sky foil region (12) is higher than the recessed area (11)
The height of second surface (111)；And
Coating (2) is set to the recessed area (11).
2. pole piece according to claim 1, which is characterized in that the coating (2) includes third surface (21), the third
Surface (21) deviates from the second surface (111)；In the short transverse of the paillon (1), third surface (21) and described the
One surface (121) is concordant.
3. pole piece according to claim 1, which is characterized in that the coating (2) includes third surface (21), the third
Surface (21) deviates from the second surface (111)；In the short transverse of the paillon (1), the first surface (121) is lower than
The third surface (21).
4. pole piece according to claim 1, which is characterized in that in the short transverse of the paillon (1), first table
Height of the face (121) close to the coating (2) side is higher than the height away from the side of the coating (2).
5. pole piece according to claim 4, which is characterized in that the first surface (121) is inclined.
6. pole piece according to claim 1, which is characterized in that length of the recessed area (11) from the paillon (1)
The side in direction extends into the other side.
7. pole piece according to claim 1, which is characterized in that length of the sky foil region (12) from the paillon (1)
The side in direction extends into the other side.
8. pole piece according to claim 1, which is characterized in that the pole piece includes full tab pole piece.
9. a kind of battery core, which is characterized in that including any pole piece of claim 1~8.
10. a kind of battery modules, which is characterized in that including battery core as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910531539.2A CN110197893A (en) | 2019-06-19 | 2019-06-19 | Pole piece, battery core and battery modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910531539.2A CN110197893A (en) | 2019-06-19 | 2019-06-19 | Pole piece, battery core and battery modules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110197893A true CN110197893A (en) | 2019-09-03 |
Family
ID=67754851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910531539.2A Pending CN110197893A (en) | 2019-06-19 | 2019-06-19 | Pole piece, battery core and battery modules |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110197893A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263256A (en) * | 2011-06-24 | 2011-11-30 | 深圳市豪鹏科技有限公司 | Negative plate and battery |
| JP2013214411A (en) * | 2012-04-02 | 2013-10-17 | Tokyo Ohka Kogyo Co Ltd | Lithium ion secondary battery negative electrode, lithium ion secondary battery, and manufacturing method of lithium ion secondary battery negative electrode |
| CN104603988A (en) * | 2012-08-29 | 2015-05-06 | 夏普株式会社 | Electrode plate and secondary battery |
| KR20150089470A (en) * | 2014-01-28 | 2015-08-05 | 주식회사 엘지화학 | Electrode Comprising Active-Material-Non-Coated Portion with thick thickness |
| CN106654286A (en) * | 2016-11-18 | 2017-05-10 | 浙江大学 | Flexible electrode and preparation method thereof |
| CN108520940A (en) * | 2018-04-20 | 2018-09-11 | 桑顿新能源科技有限公司 | A kind of coating process suitable for lithium battery production |
| CN209730054U (en) * | 2019-06-19 | 2019-12-03 | 珠海格力电器股份有限公司 | Pole piece, battery core and battery modules |
-
2019
- 2019-06-19 CN CN201910531539.2A patent/CN110197893A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263256A (en) * | 2011-06-24 | 2011-11-30 | 深圳市豪鹏科技有限公司 | Negative plate and battery |
| JP2013214411A (en) * | 2012-04-02 | 2013-10-17 | Tokyo Ohka Kogyo Co Ltd | Lithium ion secondary battery negative electrode, lithium ion secondary battery, and manufacturing method of lithium ion secondary battery negative electrode |
| CN104603988A (en) * | 2012-08-29 | 2015-05-06 | 夏普株式会社 | Electrode plate and secondary battery |
| KR20150089470A (en) * | 2014-01-28 | 2015-08-05 | 주식회사 엘지화학 | Electrode Comprising Active-Material-Non-Coated Portion with thick thickness |
| CN106654286A (en) * | 2016-11-18 | 2017-05-10 | 浙江大学 | Flexible electrode and preparation method thereof |
| CN108520940A (en) * | 2018-04-20 | 2018-09-11 | 桑顿新能源科技有限公司 | A kind of coating process suitable for lithium battery production |
| CN209730054U (en) * | 2019-06-19 | 2019-12-03 | 珠海格力电器股份有限公司 | Pole piece, battery core and battery modules |
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