CN208970632U - A kind of full tab positive plate, winding battery core - Google Patents
A kind of full tab positive plate, winding battery core Download PDFInfo
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- CN208970632U CN208970632U CN201821113590.9U CN201821113590U CN208970632U CN 208970632 U CN208970632 U CN 208970632U CN 201821113590 U CN201821113590 U CN 201821113590U CN 208970632 U CN208970632 U CN 208970632U
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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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- 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 utility model discloses a kind of full tab positive plates, winding battery core.The full tab positive plate, including the positive area Kong Bo and material area, material area side is additionally provided with the area Kong Bo.The utility model is by adding the area Kong Bo in the side in full tab anode sheet stock area, so that material area, the area Jun Youkongbo, two sides.After roll-in, deformation of extending at left and right sides of full tab positive plate is symmetrical, substantially improve winding battery core loudspeaker state and eliminate caused by the unbalance stress of pole piece two sides break band problem, overcome loudspeaker state it is serious when negative cover do not live anode defect, greatly improve yields.
Description
Technical field
The utility model relates to lithium ion battery production field more particularly to a kind of full tab anodes for making winding battery core
Piece, winding battery core.
Background technique
Inside lithium ion cell design structure common are the various structures such as monopole ear, multi pole ears, Quan Jier, stacked,
Wherein digital class baby battery internal design structures are mostly used full tab.As shown in Figure 1, being formed in aluminium foil surface coating anode material area 12
Positive plate forms negative electrode tab in copper foil surface coating cathode material area 32.Positive plate and negative electrode tab respectively after roller rolls from
The negative electrode tab that positive plate 1 and right side of the left side with the anode area Kong Bo 11 have the area cathode Kong Bo 31 is made in intermediate slitting respectively
3.31 points of the area the cathode Kong Bo two sides of the positive area Kong Bo 11 of positive plate 1 and negative electrode tab 3 are put, then in positive plate 1 and cathode
One diaphragm 2 is set between piece 3, and stacking winding forms battery core, and left side forms the full tab anode of battery core, and right side forms the complete of battery core
Tab cathode.Full extreme ear structure design is fairly simple for multi pole ears, lower to equipment requirement.But full extreme ear structure has
Where its disadvantage, easy loudspeaker after winding, negative cover does not live anode, and yields is lower.I.e. lithium dendrite growth is rapid in cyclic process,
Diaphragm pierces through, and self-discharge of battery is serious, and then causes internal short-circuit.Since plus plate current-collecting body is aluminium foil, left side anode when roll-in
The area Kong Bo 11 does not extend, and right side material area (after thickness=aluminum foil thickness+coating thickness) spreading factor is up to 1.08 or more, then
For positive plate 1 by after roll-in, right side material area is greater than the extensible extent in the left side anode area Kong Bo along the longitudinally extending amount of pole piece, causes point
The anode area Kong Bo 11 is short after item, expects the head of district, and 1 left and right sides length asymmetry of positive plate is serious, when pole piece coiling, after crossing roller
Pole piece two sides unbalance stress, the disconnected band of pole piece is serious.When winding is to expect area's boundary alignment, state and another state at positioning are not
Together, loudspeaker phenomenon is easy to produce when winding.And negative electrode tab 3, collector are copper foil, copper foil elongation about 1.02 does not prolong substantially
Exhibition will not generate material area and the 31 inconsistent phenomenon of length of the area cathode Kong Bo after roll-in.
Therefore, pole piece easily broken band when how to overcome electric core winding；And easily there is loudspeaker state, so that yields reduction lacks
Falling into is industry urgent problem to be solved.
Summary of the invention
Pole piece easily broken band when the utility model is in order to solve existing electric core winding；And easily there is loudspeaker state, so that non-defective unit
The technical issues of rate reduces, propose pole piece not easily broken band when a kind of electric core winding, the higher full tab positive plate of winding yields,
Wind battery core.
The utility model proposes full tab positive plate, including the positive area Kong Bo and material area, material area side is additionally provided with
The area Kong Bo.
Preferably, the width in the area Kong Bo is more than or equal to 1mm, the diaphragm width less than winding battery core and the material area
The half of width differential.
Preferably, the width range in the area Kong Bo is 1mm ~ 3mm.
Preferably, the width in the anode area Kong Bo is 6mm ~ 15mm.
Preferably, the width in the anode area Kong Bo is 12mm.
The utility model also proposed a kind of winding battery core comprising: the full tab positive plate that stacks gradually, every
Film and full tab negative electrode tab, the material sector width that the diaphragm both lateral sides are all larger than the full tab negative electrode tab is B, and diaphragm is horizontal
The material sector width for being all larger than the full tab positive plate to two sides is 2B.
Wherein, the B value is 2mm；The cathode sky foil sector width of the full tab negative electrode tab is 10mm.
The utility model is by adding the area Kong Bo in the side in full tab anode sheet stock area, so that there are free foil in material area two sides
Area, the former empty foil sector width 6-15mm of anode is constant, and newly-increased empty foil sector width is 1-3mm.After roll-in, Quan Jier positive plate or so
Two side lengths extend deformation symmetrically, substantially improve the loudspeaker state of winding battery core and eliminate pole piece two sides unbalance stress and lead
Cause disconnected band problem, overcome loudspeaker state it is serious when negative cover do not live anode defect, greatly improve yields.
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 the schematic diagram of the full tab positive plate preferred embodiment of the utility model；
Fig. 3 is positive plate, diaphragm and the negative electrode tab stratification position structural schematic diagram that the utility model winds battery core；
Fig. 4 is the schematic diagram for the preferred embodiment that the utility model winds battery core.
Specific embodiment
The utility model is further described below with reference to embodiment and attached drawing.
As shown in Fig. 2, being a kind of full tab positive plate provided by the utility model comprising: the positive area Kong Bo in left side
11 and intermediate anode material area 12.The area Kong Bo 13 is additionally provided on the right side of the anode material area 12.In the present embodiment, incorporated by reference to Fig. 3, empty foil
The width range in area 13 can choose more than or equal to 1mm, less than 2 width of diaphragm and 12 width of anode material area of winding battery core
The half of difference.It is preferred that the width range C in the area Kong Bo 13 is 1mm ~ 3mm.The width range in the positive area Kong Bo 11 can for 6mm ~
15mm.It is preferred that the width A in the area Kong Bo 11 is 12mm.
As shown in Fig. 1 ~ Fig. 4, the utility model proposes a kind of winding battery core preferred embodiment comprising: successively layer
It is folded the utility model proposes full tab positive plate 1, diaphragm 2 and full tab negative electrode tab 3.2 both lateral sides of diaphragm are all larger than institute
32 width of cathode material area for stating full tab negative electrode tab 3 is B, and 2 both lateral sides of diaphragm are all larger than the anode of the full tab positive plate 1
Material 12 width of area is 2B.In the present embodiment, the B value is preferably 2mm；31 width D of the area cathode Kong Bo of full tab negative electrode tab 3
For 10mm.After winding, tab is drawn from positive and negative electrode two sides.Anode empty aluminium foil 11 in left side is soldered to together, by right side cathode sky copper
Foil 31 is soldered to together, is connected positive and negative electrode tab with cover board with connecting band.
The utility model proposes winding battery core production method, steps are as follows (please referring to Fig. 1 ~ Fig. 4):
Step 1: first configured anode sizing agent being coated on aluminium foil, being formed intermediate is anode sizing agent area 12, material area
Left side be the positive area Kong Bo 11, material area on the right side of be the area Kong Bo 13 positive plate.Configured negative electrode slurry is coated on simultaneously
Negative electrode tab is made on copper foil.
Step 2: if by that can apply two in the design of full tab, then two sides are left a blank foil using conventional extruded formula coating machine,
Also there are empty foil among two coating mediums, after design compacting roll-in, by centre cut into two the utility model proposes it is complete
Tab positive plate 1；If full tab can only apply one by design, the area Kong Bo is reserved by design requirement in aluminium foil two sides when coating, is applied
Direct roll-in after cloth, can save cutting process；If be coated with using transfer type coating machine, can be applied by coating machine full-size
Cloth, then sort out the utility model proposes full tab positive plate 1.
Roll-in is carried out to the negative electrode tab, then carries out slitting, the full tab negative electrode tab 3 is made.
Step 3: finally stacking gradually the full tab positive plate 1, diaphragm 2 and full tab negative electrode tab 3, diaphragm 2 is horizontal
Two sides are all larger than the 32 width 2mm of negative electrode slurry area of the full tab negative electrode tab 3 to the left and right, and laterally the left and right sides is big for diaphragm 2
In the full tab positive plate 1 12 width of anode sizing agent area be 4mm.Purpose is that diaphragm 2 is needed to separate positive and negative plate, is prevented
Only positive and negative electrode directly contacts and generates internal short-circuit.When rolled, the covering of cathode material area 32 can be made beyond anode material area 12
Each 2mm in two sides.Make the positive area Kong Bo 11 towards left side, the area cathode Kong Bo 31 towards right winding simultaneously, complete subsequent process heat pressure,
Ultrasonic welding tab toasts, enters shell, laser welding, chemical conversion, partial volume, sorting, and battery core is made.
The utility model is by adding the area Kong Bo in the side in full tab anode sheet stock area, so that there are free foil in material area two sides
Area.Deformation of extending after roll-in, at left and right sides of Quan Jier positive plate is symmetrical, substantially improves the loudspeaker state of winding battery core and disappears
In addition to caused by the unbalance stress of pole piece two sides break band problem, overcome loudspeaker it is serious when negative cover do not live anode defect, significantly
Improve yields.
Embodiment described above is primarily to illustrate the creating conception of the utility model, it is noted that for this
For the those of ordinary skill in field, without departing from the concept of the premise utility, several deformations can also be made and changed
Into these are all within the protection scope of the present invention.
Claims (7)
1. a kind of full tab positive plate, including the positive area Kong Bo (11) and material area, which is characterized in that with the anode area Kong Bo
(11) other side in the opposite material area is additionally provided with the area Kong Bo (13).
2. full tab positive plate as described in claim 1, which is characterized in that the width in the area Kong Bo (13) is more than or equal to
1mm, diaphragm (2) width and the half of the material sector width difference less than winding battery core.
3. tab positive plate as claimed in claim 2 complete, which is characterized in that the width range of the area Kong Bo (13) be 1mm ~
3mm。
4. tab positive plate as described in claim 1 complete, which is characterized in that the width of the anode area Kong Bo (11) for 6mm ~
15mm。
5. tab positive plate as claimed in claim 4 complete, which is characterized in that the width of the anode area Kong Bo (11) is
12mm。
6. a kind of winding battery core, which is characterized in that including stacking gradually such as the described in any item full tabs of claim 1 ~ 5 just
Pole piece (1), diaphragm (2) and full tab negative electrode tab (3), the diaphragm (2) both lateral sides are all larger than the full tab negative electrode tab
(3) material sector width is B, and the material sector width that diaphragm (2) both lateral sides are all larger than the full tab positive plate (1) is 2B.
7. winding battery core as claimed in claim 6, which is characterized in that the B value is 2mm；The full tab negative electrode tab (3)
The area cathode Kong Bo (31) width be 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821113590.9U CN208970632U (en) | 2018-07-13 | 2018-07-13 | A kind of full tab positive plate, winding battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821113590.9U CN208970632U (en) | 2018-07-13 | 2018-07-13 | A kind of full tab positive plate, winding battery core |
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| Publication Number | Publication Date |
|---|---|
| CN208970632U true CN208970632U (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821113590.9U Active CN208970632U (en) | 2018-07-13 | 2018-07-13 | A kind of full tab positive plate, winding battery core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065839A (en) * | 2018-07-13 | 2018-12-21 | 珠海格力电器股份有限公司 | A kind of full tab positive plate, winding battery core and preparation method thereof |
-
2018
- 2018-07-13 CN CN201821113590.9U patent/CN208970632U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065839A (en) * | 2018-07-13 | 2018-12-21 | 珠海格力电器股份有限公司 | A kind of full tab positive plate, winding battery core and preparation method thereof |
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