CN208284581U - A kind of coiled type polymer Soft Roll lithium-ion electric core - Google Patents
A kind of coiled type polymer Soft Roll lithium-ion electric core Download PDFInfo
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- CN208284581U CN208284581U CN201820810850.1U CN201820810850U CN208284581U CN 208284581 U CN208284581 U CN 208284581U CN 201820810850 U CN201820810850 U CN 201820810850U CN 208284581 U CN208284581 U CN 208284581U
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- tab
- soft roll
- ion electric
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- electric core
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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
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Abstract
The utility model relates to a kind of coiled type polymer Soft Roll lithium-ion electric cores, including positive plate, diaphragm, negative electrode tab, tab and leveling layer；The positive plate, diaphragm and negative electrode tab stack gradually, and become pole group to same direction winding；Tab is respectively welded on positive plate and negative electrode tab, group is provided centrally with leveling layer in pole, and the leveling layer includes imbibition portion and hot-melt polymer；Between anode ear and negative electrode lug, the hot-melt polymer correspondence is covered in tab position in the imbibition portion.The utility model can not only play the role of smooth battery core, improve appearance, but also can increase the liquid storage amount of battery core, improve battery core cycle performance.
Description
Technical field
The utility model relates to lithium ion battery production fields, and in particular to a kind of coiled type polymer Soft Roll lithium-ion electric
Core.
Background technique
Polymer soft bag lithium ionic cell is made extensively in daily life because of its biggish energy density and bulk density
With.Widely applied polymer soft bag lithium ionic cell currently on the market, is made of pole group and plastic-aluminum shell.Wherein, pole group is
Active component, generally by anode pole piece, cathode pole piece and the membrane winding that is arranged between anode pole piece and cathode pole piece and
At.
With the commercialized development of polymer soft pack cell, market requires to get over to the flat appearance degree and cycle life of battery core
Come higher, conventional roll is around frame mode at present, level up tape-stripping by the tab of pole group center empty foil region with smooth pole group, by
In up- coiler adhesive tape rubberizing mechanism tolerance, adhesive tape cannot level up the space by tab completely, and cannot store electricity due to leveling up adhesive tape
Solution liquid results in the waste in space.
Utility model content
In order to overcome the deficiencies of the prior art, the utility model provides a kind of volume with flat configuration and good circulation performance
Wound polymer Soft Roll lithium-ion electric core.
Technical solution provided by the utility model is:
A kind of coiled type polymer Soft Roll lithium-ion electric core, including positive plate, diaphragm, negative electrode tab, tab and leveling layer；Institute
It states positive plate, diaphragm and negative electrode tab to stack gradually, becomes pole group to same direction winding；It is welded respectively on positive plate and negative electrode tab
Tab is connect, group is provided centrally with leveling layer in pole, and the leveling layer includes imbibition portion and hot-melt polymer；The imbibition position
Between anode ear and negative electrode lug, the hot-melt polymer correspondence is covered in tab position.
Further, the imbibition portion is polyethylene or polypropylene material with multi-cellular structure.
Further, the micropore size is 0.6 μm~3 μm.
Further, the micropore rate is 40%~60%.
Further, the imbibition portion with a thickness of 10 μm~100 μm.
Further, the hot-melt polymer is ethylene vinyl acetate, and fusing point is 70 DEG C~100 DEG C.
Further, the hot-melt polymer is with a thickness of 10 μm~100 μm.
The utility model has the advantages that
The utility model battery core levels up layer by being arranged at pole group center, levels up layer by imbibition portion and hot-melt polymer group
At between anode ear and negative electrode lug, hot-melt polymer correspondence is covered in tab position in imbibition portion.When battery core into cross hot pressing work
When skill processing, the hot melt adhesive of tab position is flowed at battery core intermediate gaps by melt-extruded, is solidified after cooling and smooth electricity
Cored structure, meanwhile, imbibition portion can adsorb and store the electrolyte injected when battery core assembly among tab.So set, both may be used
To play the role of smooth battery core, improve appearance, and the liquid storage amount of battery core can be increased, improve battery core cycle performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model battery core.
Fig. 2 is the schematic diagram in imbibition portion in the utility model battery core.
Fig. 3 is the schematic diagram of the utility model battery core.
Fig. 4 is the cycle performance test chart of the utility model.
In figure: 1- leveling layer, the pole 2- group, the first hot-melt polymer of 11-, the second hot-melt polymer of 13-, 12- imbibition portion,
The first tab of 21-, the second tab of 22-, 3- battery core, the first battery core of 31- surface tab region, the second battery core of 32- surface tab area
Domain, the first battery core of 33- surface tab lateral area, the second battery core of 34- surface tab lateral area, in the tab of 35- battery core surface
Between region, 36- battery core surface tab lower zone.
Specific embodiment
The utility model is described in further detail combined with specific embodiments below.
It please refers to shown in Fig. 1 and Fig. 2, the utility model battery core includes positive plate, negative electrode tab, is interval in positive plate and cathode
The pole group 2 that isolation film between piece is wound into, and the first tab 21, the second tab 22 are set in pole group 2, wherein pole group 2
Center be equipped with level up layer 1, the levelings layer 1 be equipped with it is corresponding with the first tab 21, the second tab 22 first hot melt gathers
Close object 11, the second hot-melt polymer 13.
In the shown embodiment, the center that layer 1 is laid in pole group 2 is leveled up, i.e. pole group 2 starts on the pole piece of winding.Pad
Leveling 1 is equipped with imbibition portion 12 and two spaced first hot-melt polymers 11, the second hot-melt polymer 13, pole group 2
Two tabs of upper setting can correspond to hot-melt polymer.
Show in embodiment in Fig. 1 and Fig. 2, an embodiment according to the present utility model, imbibition portion 12 is porous knot
The polyethylene or polypropylene of structure, micropore size are 0.6 μm~3 μm, and imbibition portion porosity is 40%~60%, with a thickness of 10 μm
~100 μm.
Show in embodiment in Fig. 1 and Fig. 2, an embodiment according to the present utility model, hot-melt polymer is ethylene
Vinylacetate, fusing point is 70 DEG C~100 DEG C, with a thickness of 10 μm~100 μm.
Show in embodiment in Fig. 1 and Fig. 2, an embodiment according to the present utility model, imbibition portion 12 is located at two
Among tab, plays the role of leveling up tab interior thickness and imbibition, increase battery core liquid storage amount.
Show in embodiment in Fig. 1 and Fig. 2, an embodiment according to the present utility model, when battery core passes through hot pressing work
When skill step, hot-melt polymer fusing, two tabs are fallen into hot-melt polymer, while hot-melt polymer flows into sky among the group of pole
At gap, battery core is using cooling, hot-melt polymer solidification, smooth battery core.So set, not only can rationally utilize battery core
Inner space increases battery core liquid storage amount, can also play the role of smooth battery core and improve battery core appearance.
In order to examine the technical effect of the utility model lithium ion battery.With flexible-packed battery 405677 (battery core with a thickness of
4.07mm) coiled lithium ion battery is as assessment object.It is made respectively of traditional technology and method provided by the utility model
Battery core, and 405677 battery cores are assembled with identical raw material, machine and technological parameter.Qualified battery core in two groups is randomly selected, is made
With the thickness in each region in battery core surface in vernier caliper measurement Fig. 3, being averaged for every group of difference battery similar face area thickness is taken
Value compares, as a result such as table 1.
Table 1
From the results shown in Table 1, thick using each region of the polymer Soft Roll lithium-ion electric wicking surface of the utility model
Degree difference maximum value is 0.05mm, differs maximum using each area thickness of the polymer Soft Roll lithium-ion electric wicking surface of traditional technology
Value is 0.17mm.It can be seen that the battery core surface smoothness using the utility model is greatly improved.
Cycle performance test
The utility model battery core and the battery core of existing not set liquid-adsorption layer are subjected to 1C/0.6C charge and discharge cycles at 45 DEG C
Test, and the capacity retention ratio of battery core is tested, test results are shown in figure 4.It is from the comparing result of Fig. 3 as can be seen that opposite
In the existing battery core of not set liquid-adsorption layer, the utility model battery core has ideal cycle life, after circulation 900 times, holds
Amount conservation rate still can achieve about 83%, hence it is evident that better than the not set battery core for leveling up layer.
The above is only the preferred embodiment of the utility model, not makees limit in any form to the utility model
System, any person skilled in the art are not departing within the scope of technical solutions of the utility model, according to the utility model
Technical spirit, any simple modifications, equivalent substitutions and improvements to the above embodiments etc., still falls within the utility model
Within the protection scope of technical solution.
Claims (7)
1. a kind of coiled type polymer Soft Roll lithium-ion electric core, it is characterised in that: including positive plate, diaphragm, negative electrode tab, tab and
Level up layer；The positive plate, diaphragm and negative electrode tab stack gradually, and become pole group to same direction winding；In positive plate and cathode
Tab is respectively welded on piece, and in pole, group is provided centrally with leveling layer, and the leveling layer includes imbibition portion and hot-melt polymer；Institute
Imbibition portion is stated between anode ear and negative electrode lug, the hot-melt polymer correspondence is covered in tab position.
2. coiled type polymer Soft Roll lithium-ion electric core according to claim 1, it is characterised in that: the imbibition portion is tool
There are the polyethylene or polypropylene material of multi-cellular structure.
3. coiled type polymer Soft Roll lithium-ion electric core according to claim 2, it is characterised in that: the micropore size is
0.6 μm~3 μm.
4. coiled type polymer Soft Roll lithium-ion electric core according to claim 2, it is characterised in that: the micropore rate
It is 40%~60%.
5. coiled type polymer Soft Roll lithium-ion electric core according to claim 1, it is characterised in that: the thickness in the imbibition portion
Degree is 10 μm~100 μm.
6. coiled type polymer Soft Roll lithium-ion electric core according to claim 1, it is characterised in that: the hot-melt polymer
For ethylene vinyl acetate.
7. coiled type polymer Soft Roll lithium-ion electric core according to claim 1, it is characterised in that: the hot-melt polymer
With a thickness of 10 μm~100 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820810850.1U CN208284581U (en) | 2018-05-29 | 2018-05-29 | A kind of coiled type polymer Soft Roll lithium-ion electric core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820810850.1U CN208284581U (en) | 2018-05-29 | 2018-05-29 | A kind of coiled type polymer Soft Roll lithium-ion electric core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208284581U true CN208284581U (en) | 2018-12-25 |
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ID=64706266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820810850.1U Active CN208284581U (en) | 2018-05-29 | 2018-05-29 | A kind of coiled type polymer Soft Roll lithium-ion electric core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208284581U (en) |
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2018
- 2018-05-29 CN CN201820810850.1U patent/CN208284581U/en active Active
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