CN205810981U - A kind of lithium-ion battery core gluing structure - Google Patents
A kind of lithium-ion battery core gluing structure Download PDFInfo
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- CN205810981U CN205810981U CN201620223167.9U CN201620223167U CN205810981U CN 205810981 U CN205810981 U CN 205810981U CN 201620223167 U CN201620223167 U CN 201620223167U CN 205810981 U CN205810981 U CN 205810981U
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- gummed paper
- pole piece
- lithium
- ion battery
- battery 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
This utility model relates to technical field of lithium-ion battery, particularly relate to a kind of lithium-ion battery core gluing structure, the core wound in the same direction after stacking gradually including anode pole piece, isolating membrane and cathode pole piece, also include that smooth gummed paper, described smooth gummed paper are pasted onto the bottom of described core.Compared with prior art, this utility model is by core bottom after wind stickup gummed paper, it is suppressed that the turning up of isolating membrane in encapsulation process, and then eliminates the isolating membrane that anode pole piece turned up and take up and cause exposed possibility of turning up；Fundamentally solve isolating membrane and anode pole piece turns up the safety issue caused and the battery core that causes because of cosmetic damage scraps problem.
Description
Technical field
This utility model relates to technical field of lithium-ion battery, particularly relates to a kind of lithium-ion battery core gluing knot
Structure.
Background technology
Lithium ion battery, because having the advantage of high working voltage, high-energy-density, long circulation life and environmental protection, becomes
One of most widely used secondary cell.But along with lithium ion battery deepening continuously and expanding in each application, respectively lead
Its security performance is required more and more higher by territory, and the sticking structure of the core surface adhesive tape of lithium ion battery is to affect cell safety
The key factor of performance.
In square soft bag lithium ionic cell manufacturing process, need the naked battery core after having wound is packaged.Such as Fig. 1
Shown in, the aluminum plastic film 6 of encapsulation typically rushes dell face 61 and shallow hole face 62, in encapsulation process, first naked battery core is put into
In dell face 61, then shallow hole face 62 is completed top side encapsulation altogether.And during the shallow hole face 62 of aluminum plastic film 6 closes easily
Extruding isolation diaphragm lower end, thus produce the phenomenon that the related anode pole piece of isolating membrane turns up；It addition, give packaged aluminum plastic film
Operate employee in the battery core of 6 during fixture and also result in turning up of pole piece with the action bottom hand push battery core.Anode pole piece turns up meeting
Making that diaphragm is exposed causes it directly to contact with aluminum-plastic membrane used for packaging 6, in test process, easily there is corrosion and micro-in pole piece region of turning up
Short-circuiting effect, affects chemical property and the security performance of resultant battery, and produces convex epirelief and affect the outward appearance of resultant battery.
Therefore, necessary naked battery core is carried out rubberizing design, to avoid at encapsulation process anode pole piece by plastic-aluminum film strips
Act the phenomenon of turning up caused.
Utility model content
The purpose of this utility model is: provide a kind of lithium-ion battery core gluing knot for the deficiencies in the prior art
Structure, occurs anode pole piece to turn up and the safety problem that causes solving lithium-ion electric core in encapsulation process.
To achieve these goals, this utility model employing solution below:
A kind of lithium-ion battery core gluing structure, stacks gradually tailing edge including anode pole piece, isolating membrane and cathode pole piece
The core of same direction winding, also includes that smooth gummed paper, described smooth gummed paper are pasted onto the bottom of described core.
On the direction being perpendicular to core winding, described isolating membrane base exceeds described cathode pole piece base 0.2 ~ 0.6mm,
Described cathode pole piece base exceeds described anode pole piece base 0.1 ~ 0.5mm.In actual production, the length of general anode pole piece is wanted
Length slightly larger than anode pole piece；If cathode pole piece is shorter than anode pole piece, then the lithium ion transmitted from positive pole is being born
Pole does not just have the anode material of correspondence to receive, and can produce the phenomenon of anode analysis lithium, cannot again enter after the most also causing analysis lithium
Row cycle charging, causes capacity to decline.And in order to prevent the direct contact of positive/negative plate, it is to avoid produce contact short circuit, isolating membrane
Length the most all can be slightly larger than cathode pole piece, in order to completely cut off positive/negative plate completely, play good insulation effect.
Described smooth gummed paper clings described anode pole piece and described isolating membrane simultaneously.
Production process finds, when battery core aluminum-plastic membrane used for packaging, collision and friction, especially aluminum plastic film can be there is unavoidably
Shallow hole face easily extrudes isolating membrane lower end during closing, and causes the related positive plate of isolating membrane easily turned up or be taken up；Separately
Outward, in the battery core of packaged aluminum plastic film during fixture operate employee also result in outside pole piece with the action bottom hand push battery core
Turn over, cause diaphragm exposed and there is potential safety hazard, so that the security performance of battery is difficult to be guaranteed.
This utility model pastes gummed paper by the core bottom after having wound, it is suppressed that isolating membrane in encapsulation process
Turn up, and then eliminate the isolating membrane that anode pole piece turned up and take up and cause exposed possibility of turning up；Fundamentally solve every
Turn up, from film and anode pole piece, the safety issue caused and the battery core that causes because of cosmetic damage scraps problem.
Preferably, a length of 3.2 ~ 25mm of described smooth gummed paper, the thickness of described smooth gummed paper is 0.005 ~ 1mm.This
Utility model length is preferably 3.2 ~ 25mm, and the shortest being pasted not strongly is consolidated, oversize waste gummed paper；The thickness of smooth gummed paper is preferably
0.005 ~ 1mm, the thinnest may adhesion strength inadequate, the thickest can affect battery core thickness, and then affect battery energy density.
Preferably, the length that described smooth gummed paper is bonded on described anode pole piece is at least 3mm.
Preferably, the length that described smooth gummed paper is bonded on described isolating membrane is at least 0.2mm, and described smooth gummed paper
Base is without departing from the base of described isolating membrane.If the base of gummed paper is exactly typically doing around glue beyond isolating membrane base
Method, although pole piece can also be prevented to a certain extent to turn up around glue, but can not because of rubberizing direction and elasticity difficulty control around glue
Completely inhibit pole piece to turn up the generation of phenomenon.
The quantity of described smooth gummed paper is set at least one.The quantity of smooth gummed paper selects according to practical situation.
General when battery core width is less, select patch one；When battery core width is bigger (such as >=70mm), preferably paste two or more pieces.
Preferably, when described smooth gummed paper is one, described smooth gummed paper is pasted onto the bottom lean-with of described core
Put.
Preferably, when described smooth gummed paper is one or more, described smooth gummed paper is pasted onto described core at equal intervals
Bottom.
Finding in production, more than 90% battery isolating film and anode pole piece turn up and occur in position, middle, therefore make smooth
Gummed paper is pasted onto this position, can more effectively prevent turning up of anode pole piece, makes the well-balanced energy of paste position strengthen smooth glue simultaneously
The bonding of paper and stressed effect.
Described smooth gummed paper is any one in PET gummed paper, PP gummed paper and PI gummed paper.Being preferably PET gummed paper, reason is
PET gummed paper has more excellent hot strength and adhesion strength, PET gummed paper hot strength >=15N/ that this utility model is selected
10mm；Adhesion strength is 2.51.0N/25mm.
The beneficial effects of the utility model are:
1) this utility model pastes gummed paper by the core bottom after having wound, it is suppressed that isolate in encapsulation process
Turning up of film, and then eliminate the isolating membrane that anode pole piece turned up and take up and cause exposed possibility；Fundamentally solve every
Turn up the safety issue caused from film and anode pole piece；
2) this utility model simple in construction, easy and simple to handle and saving material；
3) this utility model reduces the scrappage of battery core.
Accompanying drawing explanation
Fig. 1 is the structural representation of aluminum-plastic membrane used for packaging.
Fig. 2 is structural representation of the present utility model.
In figure: 1-core；2-anode pole piece；3-cathode pole piece；4-isolating membrane；The smooth gummed paper of 5-；6-aluminum plastic film；61-is deep
Pitted surface；62-shallow hole face.
Detailed description of the invention
Below in conjunction with detailed description of the invention and Figure of description, this utility model and beneficial effect thereof are made the most in detail
Describe in detail bright, but, detailed description of the invention of the present utility model is not limited thereto.
As shown in Figure 1 and 2, a kind of lithium ion battery coil core 1 gluing structure, including anode pole piece 2, isolating membrane 4 and negative pole pole
The core 1 that sheet 3 winds after stacking gradually in the same direction, also includes that smooth gummed paper 5, smooth gummed paper 5 are pasted onto core 1
Bottom.
On the direction being perpendicular to core 1 winding, isolating membrane 4 base exceeds cathode pole piece 3 base 0.2 ~ 0.6mm, negative pole
Pole piece 3 base exceeds anode pole piece 2 base 0.1 ~ 0.5mm.The length of general anode pole piece 3 is larger than the length of anode pole piece 2
Degree；If cathode pole piece 3 is shorter than anode pole piece 2, then the lithium ion transmitted from positive pole does not just have corresponding sun at negative pole
Pole material is received, and can produce the phenomenon of anode analysis lithium, cannot again be circulated charging after the most also causing analysis lithium, causes holding
Amount declines.And in order to prevent positive/negative plate from producing contact short circuit, the length of isolating membrane 4 the most all can be slightly larger than cathode pole piece 3, with
Completely cut off positive/negative plate the most completely, play good insulation effect.
During practical operation, smooth gummed paper 5 clings anode pole piece 2 and isolating membrane 4 simultaneously.
This utility model pastes gummed paper by core 1 bottom after having wound, it is suppressed that isolating membrane 4 in encapsulation process
Turn up, and then eliminate the isolating membrane 4 that anode pole piece 2 turned up and take up and cause exposed possibility of turning up；Fundamentally solve
Isolating membrane 4 and anode pole piece 2 turn up the safety issue that causes and the battery core that causes because of cosmetic damage scraps problem.
Preferably, a length of 3.2 ~ 25mm of smooth gummed paper 5, the thickness of smooth gummed paper 5 is 0.005 ~ 1mm.This practicality is new
Type length is preferably 3.2 ~ 25mm, and the shortest being pasted not strongly is consolidated, oversize waste gummed paper；The thickness of smooth gummed paper 5 is preferably 0.005 ~
1mm, the thinnest may adhesion strength inadequate, the thickest can affect battery core thickness, and then affect battery energy density.
Preferably, the length that smooth gummed paper 5 is bonded on anode pole piece 2 is at least 3mm.
Preferably, the length that smooth gummed paper 5 is bonded on isolating membrane 4 is at least 0.2mm, and the base of smooth gummed paper 5 does not surpasses
Go out the base of isolating membrane 4.
The quantity of smooth gummed paper 5 is set at least one.The quantity of smooth gummed paper 5 selects according to practical situation.One
In the case of as, when battery core width is less, select patch one；When battery core width is bigger (such as >=70mm), preferably patch two or
A plurality of.When smooth gummed paper 5 is one, smooth gummed paper 5 is pasted onto the middle position, bottom of core 1；When smooth gummed paper 5 is one
Time above, smooth gummed paper 5 is pasted onto the bottom of core 1 at equal intervals.
Finding in production, more than 90% battery isolating film 4 and anode pole piece 2 turn up and occur in position, middle, therefore make to put down
Rubberizing paper 5 is pasted onto this position, can more effectively prevent turning up of anode pole piece 2, makes well-balanced can the enhancing of paste position put down simultaneously
The bonding of rubberizing paper 5 and stressed effect.
Smooth gummed paper 5 is any one in PET gummed paper, PP gummed paper and PI gummed paper.Being preferably PET gummed paper, reason is PET glue
Paper has more excellent hot strength and adhesion strength, PET gummed paper hot strength >=15N/10mm that this utility model is selected；Viscous
Knotting strength is 2.51.0N/25mm.
This utility model uses manually or mechanically hands operation, and concrete operation step is: a hands clamps core 1 and incites somebody to action
It is fixed, and another hands clings gummed paper and is flattened on core 1 lower end, and in the longitudinal direction, gummed paper is bonded at isolation beyond anode pole piece 2
On film 4, but without departing from the end face of isolating membrane 4.
The announcement of book and teaching according to the above description, this utility model those skilled in the art can also be to above-mentioned reality
The mode of executing changes and revises.Therefore, this utility model is not limited to above-mentioned detailed description of the invention, every this area skill
Any conspicuously improved, replacement or modification that art personnel are done on the basis of this utility model belong to this practicality newly
The protection domain of type.Although additionally, employ some specific terms in this specification, but these terms are intended merely to conveniently say
Bright, this utility model is not constituted any restriction.
Claims (8)
1. a lithium-ion battery core gluing structure, stacks gradually tailing edge including anode pole piece, isolating membrane and cathode pole piece same
The core of one direction winding, it is characterised in that: also include that smooth gummed paper, described smooth gummed paper are pasted onto the end of described core
End；On the direction being perpendicular to core winding, described isolating membrane base exceeds described cathode pole piece base 0.2 ~ 0.6mm, described
Cathode pole piece base exceeds described anode pole piece base 0.1 ~ 0.5mm；Described smooth gummed paper cling simultaneously described anode pole piece and
Described isolating membrane.
A kind of lithium-ion battery core gluing structure the most according to claim 1, it is characterised in that: described smooth gummed paper
A length of 3.2 ~ 25mm, the thickness of described smooth gummed paper is 0.005 ~ 1mm.
A kind of lithium-ion battery core gluing structure the most according to claim 2, it is characterised in that: described smooth gummed paper glues
Length on described anode pole piece is at least 3mm.
A kind of lithium-ion battery core gluing structure the most according to claim 2, it is characterised in that: described smooth gummed paper glues
Length on described isolating membrane is at least 0.2mm, and the base of described smooth gummed paper is without departing from the base of described isolating membrane.
A kind of lithium-ion battery core gluing structure the most according to claim 1, it is characterised in that: described smooth gummed paper
Quantity is set at least one.
A kind of lithium-ion battery core gluing structure the most according to claim 5, it is characterised in that: when described smooth gummed paper
When being one, described smooth gummed paper is pasted onto the middle position, bottom of described core.
A kind of lithium-ion battery core gluing structure the most according to claim 5, it is characterised in that: when described smooth gummed paper
During for one or more, described smooth gummed paper is pasted onto the bottom of described core at equal intervals.
A kind of lithium-ion battery core gluing structure the most according to claim 1, it is characterised in that: described smooth gummed paper is
Any one in PET gummed paper, PP gummed paper and PI gummed paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620223167.9U CN205810981U (en) | 2016-03-22 | 2016-03-22 | A kind of lithium-ion battery core gluing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620223167.9U CN205810981U (en) | 2016-03-22 | 2016-03-22 | A kind of lithium-ion battery core gluing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205810981U true CN205810981U (en) | 2016-12-14 |
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ID=58143645
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620223167.9U Active CN205810981U (en) | 2016-03-22 | 2016-03-22 | A kind of lithium-ion battery core gluing structure |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204415A (en) * | 2017-07-11 | 2017-09-26 | 力信（江苏）能源科技有限责任公司 | A kind of high temperature safe type battery core |
-
2016
- 2016-03-22 CN CN201620223167.9U patent/CN205810981U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204415A (en) * | 2017-07-11 | 2017-09-26 | 力信（江苏）能源科技有限责任公司 | A kind of high temperature safe type battery core |
| CN107204415B (en) * | 2017-07-11 | 2023-08-08 | 利信(江苏)能源科技有限责任公司 | High-temperature safe type battery cell |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |