CN108923021A - A kind of full tab positive plate, winding battery core and preparation method thereof - Google Patents
A kind of full tab positive plate, winding battery core and preparation method thereof Download PDFInfo
- Publication number
- CN108923021A CN108923021A CN201810747273.0A CN201810747273A CN108923021A CN 108923021 A CN108923021 A CN 108923021A CN 201810747273 A CN201810747273 A CN 201810747273A CN 108923021 A CN108923021 A CN 108923021A
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- China
- Prior art keywords
- positive plate
- battery core
- full tab
- tab
- kong
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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
- 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
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The full tab positive plate that the invention discloses a kind of for improving lithium ion battery, winding battery core and preparation method thereof.The full tab anode, the anode area Kong Bo is equipped with the hole slot structure for reducing its rigidity.The present invention opens up hole slot structure by the area Kong Bo in positive plate, effectively releases the stress accumulated in nipping process, improves full tab positive plate side arc-shaped deformation, substantially increases the yields of full tab winding battery core technique；The hole slot structure of anode increases the circulation passage of battery core electrolyte, improves battery core high rate performance.
Description
Technical field
The present invention relates to lithium ion battery production field more particularly to it is a kind of improve winding battery core full tab positive plate,
Wind battery core and preparation method thereof.
Background technique
Core component of the battery core as battery, the mode for generalling use lamination and winding are assembled.Wherein, winding method
Because having the characteristics that simple process, assembly efficiency are high, being easy to automate, it is widely adopted.Inside battery design structure is common
There are monopole ear, multi pole ears, full tab.As shown in Figure 1, positive plate is formed in aluminium foil surface coating anode sizing agent 12, in copper foil table
Face is coated with negative electrode slurry 32 and forms negative electrode tab.Positive plate and the negative electrode tab slitting after roller rolls respectively, obtained left side has
The positive plate 1 in the positive area Kong Bo 11 and right side have the negative electrode tab 3 in the area cathode Kong Bo 31.Incorporated by reference to shown in Fig. 2, by positive plate 1
The positive area Kong Bo 11 and 31 points of the area the cathode Kong Bo two sides of negative electrode tab 3 put, then be arranged between positive plate 1 and negative electrode tab 3
One diaphragm 2, stacking winding form battery core, and left side forms the full tab anode of battery core, and right side forms the full tab cathode of battery core.Entirely
Extreme ear structure design is fairly simple for multi pole ears, lower to equipment requirement.The fever of full tab battery core pole piece is small, can
To realize high power density.But there is following two in such battery core：（1）The elongation that full tab positive plate rolls is higher,
And right side film area is thick, the left side area anode Kong Bo 11 is thin, during roll-in, thick right side film area is easy to be rolled longer,
And film area tension can not edge release, the positive area Kong Bo in left side then rolls smaller, therefore the extensible extent of the left and right sides that extends
Imbalance causes 1 side of positive plate arc-shaped, and the battery core after eventually leading to winding forms helicoidal structure, and negative cover does not live just
Pole, yields are lower.（2）, the weldering between tab and switching piece print, be also easy to close the electrolyte circulation channel in the region.
Therefore, how to overcome full tab electric core winding helicoidal structure occur, cause yields lower and the electricity of battery core
It is industry urgent problem to be solved that solution liquid stream, which leads to unsmooth defect,.
Summary of the invention
There is helicoidal structure to solve existing electric core winding in the present invention, so that yields is lower and tab and switching
The unsmooth technical problem of electrolyte circulation between piece proposes a kind of higher promotion of full tab winding non-defective unit and battery core electrolyte
The unobstructed full tab positive plate of improvement of circulation, winding battery core and preparation method thereof.
A kind of full tab positive plate proposed by the present invention, the anode area Kong Bo are equipped with the structure for reducing its rigidity.
Preferably, the structure for reducing the positive area Kong Bo rigidity is through-hole.
Wherein, the through-hole is at least one kind of the geometric figures such as circular hole, elliptical aperture or polygonal hole.
Preferably, the structure can also be the open slot being arranged along the anode area the Kong Bo longitudinal gap.
Wherein, after being wound into battery core, the empty foil area overlapping of anode between the adjacent open slot forms single anode
Ear.
Alternatively, the empty foil area overlapping of anode between the adjacent open slot forms multiple anodes after being wound into battery core
Ear.
The invention also provides a kind of winding battery cores with the full tab positive plate.
Present invention also proposes the production methods of the winding battery core comprising following steps：
Step 1：By the positive plate after coating, negative electrode tab slitting；
Step 2：The structure of its rigidity is lowered in production in the area positive plate Kong Bo of positive plate after slitting；
Step 3：Roll-in will be carried out equipped with the negative electrode tab after the positive plate and the slitting for lowering its stiffness structure；
Step 4：Resulting negative electrode tab, diaphragm and positive plate stack gradually after finally being made by step 3, are wound into battery core.
The present invention reduces the rigidity of the area positive plate Kong Bo material, effectively by opening up hole slot structure in the area positive plate Kong Bo
Ground releases the stress accumulated in nipping process, and balance positive plate two sides rolls deformation, overcomes the generation of positive plate side
The defect of arc combines the advantage of multi pole ears and full tab, substantially increases the yields of winding battery core technique.In addition, just
The area Ji Kongbo providing holes slot structure increases the circulation passage of battery core electrolyte, improves battery core high rate performance.
Detailed description of the invention
Fig. 1 is the schematic diagram of the full tab positive plate of existing winding battery core, diaphragm and full tab negative electrode tab；
Fig. 2 is positive plate, diaphragm and negative electrode tab the stacking schematic diagram for winding battery core；
Fig. 3, Fig. 4 are respectively the schematic diagram of full tab positive plate first embodiment and second embodiment of the invention；
Fig. 5 is the winding battery core schematic diagram being made by full tab positive plate first embodiment；
Fig. 6, Fig. 7 are respectively that the winding battery core for two kinds of anode structures being made by full tab positive plate second embodiment is illustrated
Figure.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention is further illustrated.
As shown in figure 3, being the first embodiment of full tab positive plate provided by the invention, which includes：
Aluminium foil, the anode sizing agent 12 being coated on the right side of its surface, left side are the anode area Kong Bo 11.The area anode Kong Bo 11, which is equipped with, reduces it
The structure of rigidity.In the present embodiment, the structure for reducing positive 11 material stiffness of the area Kong Bo is through-hole 111.As needed,
Can be with the hole slot of the various geometric figures of punching press, e.g., one kind of the geometric figures such as circular hole, elliptical aperture or polygonal hole or any several
The combination of figure.As shown in figure 4, be the second embodiment of full tab positive plate, different from the first embodiment, it is described to drop
The structure of 11 material stiffness of the low anode area Kong Bo is the open slot 113 being arranged along positive 11 longitudinal gap of the area Kong Bo.The present embodiment
In, longitudinal uniform intervals of the open slot 113 along the positive area Kong Bo 11 are arranged.
The production method of winding battery core proposed by the present invention, steps are as follows（Incorporated by reference to Fig. 1 ~ Fig. 4）：
Step 1：First configured anode sizing agent is coated on aluminium foil, positive plate 1 is made, cathode feed liquid is coated on copper foil
Negative electrode tab 2 is made, then positive and negative plate centering is subjected to slitting.
Step 2：The structure of its rigidity is lowered in production in the area positive plate Kong Bo 11 of positive plate after slitting.According to need
It wants, the hole slot of various geometric figures, e.g., circular hole, elliptical aperture or polygonal hole can be stamped out in the left side area positive plate Kong Bo 11
One kind of equal geometric figures or the various combination of any several figures.It can also stamp out along the longitudinal gap in the positive area Kong Bo 11
Open slot 113.
Step 3：Roll-in will be carried out equipped with the negative electrode tab 2 after the positive plate 1 and the slitting for lowering its stiffness structure；
Step 4：Resulting negative electrode tab 3, diaphragm 2 and positive plate 1 stack gradually after finally being made by step 3, while making just
It completes subsequent technique towards left side, the area cathode Kong Bo 31 towards right winding and battery core is made in the area pole piece Kong Bo 11.
After winding battery core, as shown in figure 5, the left side area anode Kong Bo 11 forms the full tab anode 14 for having through-hole 111,
The right side area cathode Kong Bo 31 forms full tab cathode 33；As shown in fig. 6, the positive area Kong Bo between left side adjacent apertures slot 113
Single anode ear 112 is overlapped to form, the right side area cathode Kong Bo 31 forms full tab cathode 33；Spacing, such as Fig. 7 can also have been set
It is shown, so that the empty foil area overlapping of anode between adjacent apertures slot 113 forms multiple anode ears 114, the right side area cathode Kong Bo 31
Form full tab cathode 33.
The present invention effectively releases answering of accumulating in nipping process by opening up hole slot structure in the area positive plate Kong Bo
Power improves positive plate side arc-shaped deformation, substantially increases the yields of winding battery core technique；The hole slot structure of anode increases
The circulation passage of battery core electrolyte, improves battery core high rate performance.
Embodiment described above is primarily to illustrate creating conception of the invention, it is noted that for this field
Those of ordinary skill for, without departing from the inventive concept of the premise, various modifications and improvements can be made, these are all
It belongs to the scope of protection of the present invention.
Claims (8)
1. a kind of full tab positive plate, which is characterized in that the full tab positive plate（1）The positive area Kong Bo（11）Being equipped with reduces
The structure of its rigidity.
2. full tab positive plate as described in claim 1, which is characterized in that the structure is through-hole (111).
3. full tab positive plate as claimed in claim 2, which is characterized in that the through-hole (111) is at least circular hole, ellipse
One kind of hole or polygonal hole.
4. full tab positive plate as described in claim 1, which is characterized in that the structure is along the anode area Kong Bo
（11）The open slot of longitudinal gap setting（113）.
5. full tab positive plate as claimed in claim 4, which is characterized in that after winding battery core, the adjacent open slot
（113）Between the positive area Kong Bo（112）Overlap to form single anode ear.
6. such as claim4The full tab positive plate, which is characterized in that after winding battery core, the adjacent open slot
（113）Between the positive area Kong Bo（112）Overlap to form multiple anode ears.
7. a kind of winding battery core, which is characterized in that have the full tab positive plate as described in claim 1 ~ 6.
8. a kind of production method of winding battery core as claimed in claim 7 comprising following steps：
Step 1：By the positive plate after coating, negative electrode tab slitting；
Step 2：The structure of its rigidity is lowered in production in the area positive plate Kong Bo of the positive plate after slitting；
Step 3：Roll-in will be carried out respectively equipped with the negative electrode tab after the positive plate and the slitting for lowering its stiffness structure；
Step 4：Resulting negative electrode tab, diaphragm and positive plate stack gradually after finally being made by step 3, are wound into battery core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810747273.0A CN108923021A (en) | 2018-07-09 | 2018-07-09 | A kind of full tab positive plate, winding battery core and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810747273.0A CN108923021A (en) | 2018-07-09 | 2018-07-09 | A kind of full tab positive plate, winding battery core and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108923021A true CN108923021A (en) | 2018-11-30 |
Family
ID=64411487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810747273.0A Withdrawn CN108923021A (en) | 2018-07-09 | 2018-07-09 | A kind of full tab positive plate, winding battery core and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108923021A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952101A (en) * | 2021-02-09 | 2021-06-11 | 大连中比动力电池有限公司 | Cylindrical lithium ion secondary battery and preparation method thereof |
| CN115084430A (en) * | 2022-07-20 | 2022-09-20 | 苏州宇量电池有限公司 | Full-lug battery cell, battery and assembly method |
| WO2022233050A1 (en) * | 2021-05-07 | 2022-11-10 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery, device, and manufacturing method for electrode assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000208129A (en) * | 1999-01-13 | 2000-07-28 | Ngk Insulators Ltd | Lithium secondary battery |
| JP2008066050A (en) * | 2006-09-06 | 2008-03-21 | Matsushita Electric Ind Co Ltd | Manufacturing method of electrode plate for lithium secondary battery |
| JP2011171107A (en) * | 2010-02-18 | 2011-09-01 | Hitachi Ltd | Lithium ion battery and method for manufacturing the same |
| CN104916868A (en) * | 2015-07-03 | 2015-09-16 | 深圳市慧通天下科技股份有限公司 | Cylindrical lithium ion power battery and manufacturing process thereof |
| CN205303580U (en) * | 2016-01-22 | 2016-06-08 | 宁德时代新能源科技股份有限公司 | Lithium ion battery pole piece and contain lithium ion battery of this pole piece |
| CN205645969U (en) * | 2016-03-08 | 2016-10-12 | 宁德时代新能源科技股份有限公司 | Secondary cell utmost point ear and secondary cell |
-
2018
- 2018-07-09 CN CN201810747273.0A patent/CN108923021A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000208129A (en) * | 1999-01-13 | 2000-07-28 | Ngk Insulators Ltd | Lithium secondary battery |
| JP2008066050A (en) * | 2006-09-06 | 2008-03-21 | Matsushita Electric Ind Co Ltd | Manufacturing method of electrode plate for lithium secondary battery |
| JP2011171107A (en) * | 2010-02-18 | 2011-09-01 | Hitachi Ltd | Lithium ion battery and method for manufacturing the same |
| CN104916868A (en) * | 2015-07-03 | 2015-09-16 | 深圳市慧通天下科技股份有限公司 | Cylindrical lithium ion power battery and manufacturing process thereof |
| CN205303580U (en) * | 2016-01-22 | 2016-06-08 | 宁德时代新能源科技股份有限公司 | Lithium ion battery pole piece and contain lithium ion battery of this pole piece |
| CN205645969U (en) * | 2016-03-08 | 2016-10-12 | 宁德时代新能源科技股份有限公司 | Secondary cell utmost point ear and secondary cell |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952101A (en) * | 2021-02-09 | 2021-06-11 | 大连中比动力电池有限公司 | Cylindrical lithium ion secondary battery and preparation method thereof |
| WO2022233050A1 (en) * | 2021-05-07 | 2022-11-10 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery, device, and manufacturing method for electrode assembly |
| CN115084430A (en) * | 2022-07-20 | 2022-09-20 | 苏州宇量电池有限公司 | Full-lug battery cell, battery and assembly method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181130 |