CN208226010U - A kind of high-energy density laminated structure and soft bag lithium ionic cell - Google Patents
A kind of high-energy density laminated structure and soft bag lithium ionic cell Download PDFInfo
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- CN208226010U CN208226010U CN201820872816.7U CN201820872816U CN208226010U CN 208226010 U CN208226010 U CN 208226010U CN 201820872816 U CN201820872816 U CN 201820872816U CN 208226010 U CN208226010 U CN 208226010U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 6
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 6
- 238000010276 construction Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 description 30
- 238000000034 method Methods 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
- 239000006258 conductive agent Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 239000011888 foil Substances 0.000 description 7
- 238000007731 hot pressing Methods 0.000 description 7
- 239000006257 cathode slurry Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 239000006256 anode slurry Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000003447 ipsilateral effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 210000004379 membrane Anatomy 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 210000002469 basement membrane Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
-
- 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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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model discloses a kind of high-energy density laminated structure and soft bag lithium ionic cell, the laminated structure includes: several cathode sheets to form ABC stacking, several diaphragms, several anode pole pieces, wherein, each cathode sheet include " convex " shape cathode dressing area, one be set to the left notch of cathode dressing area " convex " shape the area cathode Kong Bo, one be set to the right notch of cathode dressing area " convex " shape the first notch；Each anode pole piece include " convex " shape anode dressing area, one be set to the left notch of anode dressing area " convex " shape the area anode Kong Bo, one be set to the right notch of anode dressing area " convex " shape the second notch；Each diaphragm assumes a " convex " shape construction；First notch of the cathode sheet and the second notch of anode pole piece are staggeredly stacked." space waste " region caused by the utility model makes full use of traditional battery core to design, effectively improves the energy density of battery core, including volume energy density and mass energy density.
Description
Technical field
The utility model relates to technical field of lithium ion, in particular to a kind of high-energy density laminated structure and soft
Packet lithium ion battery.
Background technique
Existing lithium ion battery lamination formula structure is: including several cathode sheets, several anode pole pieces, cathode sheet and sun
Pole pole piece and diaphragm are stacked according to Z-shaped.Cathode tab is leant out from cathode sheet upper left end, and anode tab is from anode
Pole piece upper right end is leant out, this is the ipsilateral extraction of tab.Alternatively, cathode tab upper end from cathode sheet is leant out, anode pole
Ear lower end from anode pole piece is leant out, this is the extraction of tab heteropleural.Tab it is ipsilateral extraction be current lamination type electric core it is most common,
The structure of most mainstream.
Either the ipsilateral extraction of tab or tab heteropleural are drawn, and all there is the phenomenon that battery core space waste.That is: tab is same
The battery core that side is drawn wastes the space (that is, being located at the space in aluminum plastic film between two tab of closedtop area) between two tabs, and tab is different
Side draw battery core waste tab two sides space (that is, be located at aluminum plastic film in closedtop area and underseal area tab two sides sky
Between), the utility model is based on this and researches and develops.
Utility model content
In view of the problems of the existing technology, the utility model provides a kind of high-energy density laminated structure and Soft Roll lithium
Ion battery.
Firstly, the utility model provides a kind of high-energy density laminated structure, specific technical solution is as follows:
A kind of high-energy density laminated structure, comprising: form several cathode sheets that ABC stacks, several diaphragms, several
Anode pole piece, wherein each cathode sheet includes " convex " shape cathode dressing area, one set on cathode dressing area " convex " shape left side
The area cathode Kong Bo of notch, one be set to the right notch of cathode dressing area " convex " shape the first notch；Each anode pole piece includes
One " convex " shape anode dressing area, one are set to the area anode Kong Bo of the right notch of anode dressing area " convex " shape, one set on anode dressing area
Second notch of the left notch of " convex " shape；Each diaphragm assumes a " convex " shape construction；The first notch and sun of the cathode sheet
Second notch of pole pole piece is staggeredly stacked.
Preferably, described " convex " the shape diaphragm is set between cathode sheet and anode pole piece, and " convex " shape diaphragm is greater than anode
" convex " shape dressing area, marginal dimension 0.5~4mm of surplus, anode " convex " shape dressing area are greater than cathode " convex " shape dressing area, edge ruler
Very little 0.5~4mm of surplus.
The utility model also provides a kind of soft bag lithium ionic cell being prepared using above-mentioned laminated structure, comprising:
Using the battery core main body of above-mentioned laminated structure composition, cathode tab, anode tab；The cathode tab is welded on cathode sky foil
Area, the anode tab welding is in the area anode Kong Bo.
Using the technical solution of the utility model, the laminated structure of the utility model is designed, and makes full use of traditional battery core
" space waste " region caused by design can effectively improve the energy density of battery core on the basis of battery core internal structure design,
Including volume energy density and mass energy density.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model cathode sheet structural schematic diagram；
Fig. 3 is the utility model anode pole piece structural schematic diagram；
Fig. 4 is the schematic diagram of cell structure of the utility model combination tab；
The structural schematic diagram of cathode sheet batch making in Fig. 5 the utility model；
The structural schematic diagram of Fig. 6 the utility model Anodic pole piece batch making；
Fig. 7 is the structural schematic diagram of the utility model septation batch making；
Fig. 8 is the stacking cellular construction schematic diagram in the utility model；
Fig. 9 is the bag making cellular construction schematic diagram in the utility model.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Referring to figs. 1 to Fig. 4, a kind of high-energy density laminated structure, comprising: several cathode sheets of formation ABC stacking,
Several diaphragms 8, several anode pole pieces, wherein each cathode sheet includes that " convex " shape cathode dressing area 6, one is set to yin
The area cathode Kong Bo 2, one of the left notch of pole dressing area 6 " convex " shape is set to the first notch 9 of the right notch of cathode dressing area 6 " convex " shape；
Each anode pole piece includes the anode sky that " convex " shape anode dressing area 7, one is set to the right notch of anode dressing area 7 " convex " shape
Foil area 4, one is set to the second notch 10 of the left notch of anode dressing area " convex " shape；Each diaphragm 8 assumes a " convex " shape construction；Institute
Second notch 10 of the first notch 9 and anode pole piece of stating cathode sheet is staggeredly stacked.
Wherein, described " convex " the shape diaphragm 8 is set between cathode sheet and anode pole piece, and " convex " shape diaphragm 8 is greater than anode
" convex " shape dressing area 7, marginal dimension 0.5~4mm of surplus, anode " convex " shape dressing area 7 are greater than cathode " convex " shape dressing area 6, side
0.5~4mm of edge size surplus.
The utility model also provides a kind of soft bag lithium ionic cell being prepared using above-mentioned laminated structure, comprising:
Using the battery core main body 5 of above-mentioned laminated structure composition, cathode tab 1, anode tab 3；The cathode tab is welded on cathode
The area Kong Bo, the anode tab welding is in the area anode Kong Bo.
Referring to fig. 2 with Fig. 5, the shape in the cathode sheet dressing area 6 in the utility model realizes by the following method:
(1), the area cathode Kong Bo 2 is generated by the dressing of laser cleaning cathode sheet top left region；Or
(2), by the way that when cathode sheet top left region rubberizing is to prevent dressing, slurry contacts foil in advance, then by gummed paper
Removal generates the area cathode Kong Bo 2.Further, the first notch 9 of anode tab can be corresponded in cathode sheet upper right edge
Cathode coverage material is saved in region rubberizing.Further, to improve process efficiency, the cathode sheet should be pre-processed, and be made
For at continuous pole piece as shown in Figure 5, the continuous pole piece includes cathode dressing area 6, the first notch 9 and the (weldering of the area cathode Kong Bo 2
Connect region).
Referring to Fig. 3 and Fig. 6, the shape in the anode pole piece dressing area 7 in the utility model is realized by the following method:
(1), the area anode Kong Bo 4 is generated by the dressing of laser cleaning anode pole piece right regions；Or
(2), by the way that when anode pole piece right regions rubberizing is to prevent dressing, slurry contacts foil in advance, then by gummed paper
Removal generates the area anode Kong Bo 4.Further, the rectangular-shaped of cathode tab can be corresponded in anode pole piece upper right edge
Anode coating material is saved in second notch, 10 region rubberizing.Further, to improve process efficiency, the anode pole piece is answered
It pre-processes, is prepared into continuous pole piece as shown in FIG. 6, the continuous pole piece includes anode dressing area 7, the second notch 10 and sun
The area Ji Kongbo 4 (welding region).
Referring to Fig. 7, there is isolation film 8 between cathode dressing described in the utility model area 6 and anode dressing area 7, it is described
Isolation film 8 is that one of PE, PP, PMMA, PEO, PAN, PVC, PVdF and ceramics or a variety of composite materials form, the isolation
The shape of film 8 is "convex" shaped, and the isolation film 8 should be die cut in advance, is prepared into "convex" shaped.More specifically, to improve
Process efficiency, the isolation film 8 should be prepared into continuous "convex" shaped as shown in Figure 7, and the continuous "convex" shaped diaphragm includes
Isolation film 8, diaphragm notch 11 and diaphragm cutting line 12.Preferably, the isolation film 8 should be gluing diaphragm, the gluing diaphragm
For single spreading diaphragm or double spread diaphragm, the gluing diaphragm can preferably be bonded cathode dressing area 6 and sun in hot pressing
Pole dressing area 7 is conducive to be prepared into the cathode sheet 6- isolation film 8- anode pole piece 7- isolation film 8 such as Fig. 1 or the isolation such as Fig. 8
The battery unit of film 8- anode pole piece 7- isolation film 8, in addition, gluing diaphragm is swollen in the electrolytic solution, it will improve diaphragm and pole
Caking property between piece preferably keeps battery core shape.
As one of the preferred embodiment for preparing battery unit: by the cathode sheet being prepared (Fig. 2), anode pole piece (figure
3) it is combined into isolation film 8 according to the sequence hot pressing of cathode sheet 6- isolation film 8- anode pole piece 7- isolation film 8 as shown in Figure 1
Battery unit is then stacked up by battery unit, and the outermost layer close to cathode sheet 6 is superimposed one layer of heat as shown in Figure 8 again
Compound 8 junior unit of isolation film 8- anode pole piece 7- isolation film is pressed, it is compound that obtained folded core is then carried out a hot pressing again, most
The loop structure of isolation film 8- anode pole piece 7- isolation film 8- cathode sheet 6- isolation film 8- anode pole piece 7- isolation film 8 is obtained eventually
Unit.Cathode dressing region 6 is completely covered in the structural unit anode dressing region 7, and the isolation film 8 is completely covered anode and applies
Expect region 7.Then shape is reinforced in folded core edge rubberizing, cathode is respectively welded in the area cathode Kong Bo 2 and the area anode Kong Bo 4
Tab 1 and anode tab 3 are then loaded into good " convex " the shape aluminum plastic membrane shell of stamp, shape such as Fig. 4 institute finally can be obtained
The battery core shown.
As one of the alternative for preparing battery unit: the cathode sheet being prepared (Fig. 2) is covered on diaphragm 8
On, diaphragm 8 described in this scheme is one of PE, PP, PMMA, PEO, PAN, PVC, PVdF basement membrane or several composite diaphragms, pottery
Porcelain composite diaphragm or gluing diaphragm then cover a floor diaphragm 8 again in cathode dressing area 6.The isolation film 8- that will be prepared
Cathode sheet 6- isolation film unit 8 carries out edge sealing bag making 14 according to as shown in Figure 9.The edge sealing process be hot-pressing, edge-sealing, i.e., every
It partially melts and is mutually bonded at a certain temperature from film.Then the isolation film 8- cathode that will be prepared by this bag-making method
Pole piece 6- isolation film unit 8 is stacked with anode pole piece 7, and hot pressing is compound, finally obtains isolation film 8- anode pole piece 7- isolation
The loop structure unit of -8 anode pole piece 7- isolation film 8 of film 8- cathode sheet 6- isolation film.The structural unit anode dressing area
Cathode dressing region 6 is completely covered in domain 7, and anode dressing region 7 is completely covered in the isolation film 8.Then in folded core edge
Shape is reinforced in rubberizing, cathode tab 1 and anode tab 3 is respectively welded in the area cathode Kong Bo 2 and the area anode Kong Bo 4, then by it
It is fitted into good " convex " the shape aluminum plastic membrane shell of stamp, shape battery core as shown in Figure 4 finally can be obtained.
The following are specific embodiment and correlated performance results:
Embodiment 1:
With m ternary material: m conductive agent: binder=97.8 m: preparing cathode slurry after 1.2: 1.0 wet mixings, with m graphite
: m conductive agent: m binder: dispersing agent=94.6 m: preparing anode slurry after 2: 1.8: 1.6 wet mixings, then by cathode slurry
It is evenly applied in aluminum foil current collector, anode is evenly applied in copper foil current collector with slurry, then according to this above structure
Battery unit is prepared in design hot pressing, is then stacked, is encapsulated, and the sample electricity of model XXF6Q0 is finally prepared
Core.
Comparative example 1:
With m ternary material: m conductive agent: binder=97.8 m: preparing cathode slurry after 1.2: 1.0 wet mixings, with m graphite
: m conductive agent: m binder: dispersing agent=94.6 m: preparing anode slurry after 2: 1.8: 1.6 wet mixings, then by cathode slurry
It is evenly applied in aluminum foil current collector, anode is evenly applied in copper foil current collector with slurry, then traditionally (i.e.
Region two tab of closedtop area is not handled) lamination, encapsulation etc. are carried out, finally obtain the sample electricity of model XXF6Q0
Core.It should be noted that embodiment 1 and comparative example 1 are other than structurally different, other design informations and processing conditions are complete
Unanimously.
Embodiment 2:
After replacing another money ternary material, with the new ternary material of m: m conductive agent: binder=97.8 m: 1.2: 1.0 wet mixings
After prepare cathode slurry, after replacing another money graphite material, with the new graphite of m: m conductive agent: m binder: dispersing agent=94.6 m
: anode slurry is prepared after 2: 1.8: 1.6 wet mixings, is then evenly applied to cathode in aluminum foil current collector with slurry, by anode
It is evenly applied in copper foil current collector with slurry, battery unit then is prepared according to the hot pressing of this said structure design, then
It stacked, encapsulated, the sample battery core of model XXF6Q0 is finally prepared.
Comparative example 2:
After replacing ternary material same as Example 2, with the new ternary material of m: m conductive agent: binder=97.8 m: 1.2
: cathode slurry is prepared after 1.0 wet mixings, after replacing graphite same as Example 2, with the new graphite of m: m conductive agent: m binder:
Dispersing agent=94.6 m: preparing anode slurry after 2: 1.8: 1.6 wet mixings, cathode is then evenly applied to aluminium foil collection with slurry
On fluid, anode is evenly applied in copper foil current collector with slurry, then traditionally (i.e. not to two tab of closedtop area
Between region handled) carry out lamination, encapsulation etc., finally obtain the sample battery core of model XXF6Q0.It should be noted that real
Example 2 and comparative example 2 are applied other than structurally different, other design informations and processing conditions are completely the same.
In conjunction with the performance test data of table 1, designed using the utility model structure, it is thus evident that in the area cathode Kong Bo 2 and sun
Space between the area Ji Kongbo 4 is utilized completely, and the active material filled therebetween will provide more capacity and energy for battery core,
More specifically, the energy density of battery core will be improved.
Table 1
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (3)
1. a kind of high-energy density laminated structure characterized by comprising form several cathode sheets, several that ABC is stacked
Diaphragm, several anode pole pieces, wherein each cathode sheet includes " convex " shape cathode dressing area, one set on cathode dressing
The area cathode Kong Bo of the left notch of area " convex " shape, one be set to the right notch of cathode dressing area " convex " shape the first notch；Each sun
Pole pole piece includes " convex " shape anode dressing area, one is set to the area anode Kong Bo of the right notch of anode dressing area " convex " shape, one is set to
Second notch of the left notch of anode dressing area " convex " shape；Each diaphragm assumes a " convex " shape construction；The of the cathode sheet
Second notch of one notch and anode pole piece is staggeredly stacked.
2. laminated structure according to claim 1, which is characterized in that " convex " the shape diaphragm is set to cathode sheet and sun
Between the pole piece of pole, " convex " shape diaphragm is greater than anode " convex " shape dressing area, marginal dimension 0.5~4mm of surplus, anode " convex " shape dressing
Area is greater than cathode " convex " shape dressing area, 0.5~4mm of marginal dimension surplus.
3. a kind of soft bag lithium ionic cell characterized by comprising using laminated structure described in one of claim 1-2
The battery core main body of composition, cathode tab, anode tab；The cathode tab is welded on the area cathode Kong Bo, the anode tab weldering
It connects in the area anode Kong Bo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820872816.7U CN208226010U (en) | 2018-06-06 | 2018-06-06 | A kind of high-energy density laminated structure and soft bag lithium ionic cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820872816.7U CN208226010U (en) | 2018-06-06 | 2018-06-06 | A kind of high-energy density laminated structure and soft bag lithium ionic cell |
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| CN208226010U true CN208226010U (en) | 2018-12-11 |
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ID=64504624
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300751A (en) * | 2021-12-15 | 2022-04-08 | 惠州锂威新能源科技有限公司 | Multi-electrode ear lithium ion battery and preparation method thereof |
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2018
- 2018-06-06 CN CN201820872816.7U patent/CN208226010U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300751A (en) * | 2021-12-15 | 2022-04-08 | 惠州锂威新能源科技有限公司 | Multi-electrode ear lithium ion battery and preparation method thereof |
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