CN209389154U - A kind of safe lithium ion battery - Google Patents
A kind of safe lithium ion battery Download PDFInfo
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- CN209389154U CN209389154U CN201920397948.3U CN201920397948U CN209389154U CN 209389154 U CN209389154 U CN 209389154U CN 201920397948 U CN201920397948 U CN 201920397948U CN 209389154 U CN209389154 U CN 209389154U
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- Prior art keywords
- lithium ion
- ion battery
- adhesive layer
- 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
The utility model provides a kind of safe lithium ion battery, the lithium ion battery includes battery core, the packaging bag for accommodating battery core and the electrolyte that is filled in packaging bag, battery core is formed by positive plate, negative electrode tab, the membrane winding being arranged between positive plate and negative electrode tab, it is characterized by: being provided with adhesive layer at least one of side surface of battery core, battery core is integrated by adhesive layer and the inner adhesion of packaging bag.The lithium ion battery of example embodiment according to the present utility model, adhesive layer can have very thin thickness, very big area and the very strong characteristic of viscosity and effectively improve the drop performance of battery while can largely keeping the high-energy density of battery.
Description
Technical field
The utility model relates to technical field of lithium ion, in particular to the lithium-ion electric of the safety of a kind of winding-structure
Pond.
Background technique
Secondary cell of the lithium ion battery as a kind of environmental protection, in portable device such as mobile phone, video camera, notebook
The fields such as computer are widely applied.However, numerous portable devices are all to intelligent, more with the development of modern society
Functionalization strides forward, and in order to meet its requirement to capacity and power, guarantee its abundance uses the time, it is desirable that its power source is necessary
With higher energy density and bigger capacity.It, may but when high-energy density and high capacity cell are when complete machine is fallen
Cause battery core to relatively move in the battery, and pole plate meeting gouge, to be easy to that short circuit occurs, or even causes kindling existing
As.
Current lithium battery enterprise usually pastes one layer of Double-face gummed paper in the outermost layer of battery core and passes through with a thickness of about 50 μm
Double-face gummed paper is bonded together battery core and outer packing, improves the drop performance of battery with this.However, the thickness of Double-face gummed paper
It is very thick, it will affect the space utilization of battery, and due to the limited area that Double-face gummed paper pastes, thus to battery drop performance
Improvement is also limited.And when the area that Double-face gummed paper pastes is larger, buckling problems can occur in automated production, thus
The appearance and thickness of battery are influenced, and when fold position is squeezed in cell production process, also has internal short-circuit risk.
Based on the above reasons, can only be in the outermost limited size sticking two-faced adhesive tape paper of battery core, therefore lithium ion battery is fallen
The help of performance improvement is smaller.The drop performance of high capacity lithium ion battery is improved, is still the maximum skill of lithium electricity industry
Art problem.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of safe lithium-ion electric
Pond.
The utility model provides a kind of safe lithium ion battery, and the lithium ion battery includes battery core, described in receiving
The packaging bag of battery core and the electrolyte being filled in the packaging bag, the battery core by positive plate, negative electrode tab, setting it is described just
Membrane winding between pole piece and the negative electrode tab forms, it is characterised in that: at least one of side surface of the battery core
It is provided with adhesive layer, the battery core is integrated by the adhesive layer and the inner adhesion of the packaging bag.
In the example embodiment of the utility model, adhesive layer in the side surface of battery core described in have at least one
Dot pattern.
In the example embodiment of the utility model, adhesive layer in the side surface of battery core described in have at least one
Linear pattern.
In the example embodiment of the utility model, adhesive layer has mesh pattern.
In the example embodiment of the utility model, adhesive layer has the curved linear pattern of duplicate serpentine.
In the example embodiment of the utility model, adhesive layer is after molding with a thickness of 2 μm to 30 μm in battery extrusion.
In the example embodiment of the utility model, lithium ion battery have cylinder, elliptical cylinder-shape, polygon cylindricality or
The shape of pouch-shaped.
In the example embodiment of the utility model, be provided on the top surface of battery core positive pole ear separated from one another and
Negative lug.
The lithium ion battery of the safety of the winding-structure of exemplary embodiment according to the present utility model passes through in battery core
Outermost layer is provided with the adhesive layer of spraying, after being assembled into battery, the very thin thickness of this adhesive layer and can be with the inside of packaging bag
It is bonded as one, can largely keep the high-energy density of battery, to be effectively improved the drop performance of battery.
Therefore, the lithium ion battery structure letter of the safety of the winding-structure of exemplary embodiment according to the present utility model
Easily, easy to implement, cost is greatly reduced than Double-face gummed paper, and can high-volume automated production.
Detailed description of the invention
The various aspects of being described below to the exemplary embodiment of the utility model in conjunction with the accompanying drawings, the utility model will
It becomes better understood by.
Fig. 1 is the decomposition perspective view of the lithium ion battery of example embodiment according to the present utility model.
Fig. 2 is the diagram of the battery core of the lithium ion battery of example embodiment according to the present utility model.
Fig. 3 is the diagram of the battery core of the lithium ion battery of another example embodiment according to the present utility model.
Fig. 4 is the diagram of the method for the manufacture lithium ion battery of example embodiment according to the present utility model.
Fig. 5 is the diagram of the method for the manufacture lithium ion battery of example embodiment according to the present utility model.
Specific embodiment
Hereinafter, exemplary embodiment will be explained by reference to attached drawing the utility model structure is described in detail
Think.However, the utility model design can be embodied in many different forms, and it should not be construed as being limited to this paper institute
The embodiment of elaboration；On the contrary, provide embodiment be in order to enable the utility model is clear and complete, and will be to this field
Those of ordinary skill fully communicates the design of the utility model.
Describe lithium ion battery according to the present utility model in detail below with reference to accompanying drawings.
Fig. 1 is the decomposition perspective view of the lithium ion battery of example embodiment according to the present utility model.
Fig. 2 is the diagram of the battery core of the lithium ion battery of example embodiment according to the present utility model.
Fig. 3 is the diagram of the battery core of the lithium ion battery of another example embodiment according to the present utility model.
Referring to figs. 1 to Fig. 3, lithium ion battery include battery core 10, the packaging bag 20 (see Fig. 4) for accommodating the battery core and
The electrolyte being filled in packaging bag 20.Battery core 10 may include positive plate 101, negative electrode tab 102, be arranged in 101 and of positive plate
Diaphragm 103 and adhesive layer 60 between negative electrode tab 102.It in some embodiments, can be by sequentially stacking and winding just
Then the product of winding is contained in packaging bag 20 and manufactures lithium ion battery by pole piece 101, diaphragm 103 and negative electrode tab 102.
In example embodiment according to the present utility model, packaging bag 20 is metallo-plastic composite membrane, wherein metallo-plastic
Composite membrane includes metal layer and the plastic layer that layer on surface of metal is arranged in, and metal layer can be by aluminium, aluminium alloy or stainless steel shape
At plastic layer can be formed by polypropylene or polyethylene.
Lithium ion battery can have the shape of cylinder, elliptical cylinder-shape, polygon cylindricality or pouch-shaped.In following example
It will be described by taking the lithium ion battery of pouch-shaped as an example in embodiment.
In example embodiment according to the present utility model, battery core 10 includes top surface S1 and bottom surface S2 facing with each other
And the side surface S3 and S4 of connection top surface S1 and bottom surface.Be provided on the top surface S1 of battery core 10 it is separated from one another just
Pole tab 41 and negative lug 71.
In the lithium ion battery of example embodiment according to the present utility model, in the side surface S3 and S4 of battery core 10 extremely
Adhesive layer 60 is provided on one few.In an exemplary embodiment according to the present utility model, adhesive layer 60 can be coated
On side surface a S3 or S4 of battery core 10.In another example embodiment according to the present utility model, adhesive layer 60 can be with
On all side surfaces coated in battery core 10.
In an exemplary embodiment according to the present utility model, adhesive layer 60 can be coated by dotted spraying method
There can be on to battery core 10 and on the side surface of battery core 10 dot pattern, as shown in Figure 2.According to the utility model
An exemplary embodiment in, adhesive layer 60 can be coated in battery core 10 in wire-like spray method and can be in battery core 10
There is linear pattern on side surface.For example, as shown in Figure 3, adhesive layer 60 can have duplicate serpentine bending or the song that wriggles
The linear pattern of folding.However, the utility model is without being limited thereto, adhesive layer 60 can have mesh pattern.
Adhesive layer 60 can be by polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) (PTFE), acrylate, epoxy resin etc.
One of or combinations thereof formed.
The battery core 10 of the lithium ion battery of example embodiment according to the present utility model can pass through adhesive layer 60 and packaging
The inner adhesion of bag 20 is integrated, to be effectively improved the drop performance of battery.
Adhesive layer compared with the thicker Double-face gummed paper used in the prior art, in the example embodiment of the utility model
It can have very thin thickness, area is very big and the very strong characteristic of viscosity.Therefore, the high energy of battery can largely be kept
While metric density, the drop performance of battery is effectively improved.
In addition, the simple structure of the lithium ion battery of example embodiment according to the present utility model, cost compares Double-face gummed paper
It is greatly reduced, the simple and quick convenience of manufacturing method, therefore can high-volume automated production.
Fig. 4 is the diagram of the method for the manufacture lithium ion battery of example embodiment according to the present utility model.
Fig. 5 is the diagram of the method for the manufacture lithium ion battery of example embodiment according to the present utility model.It below will knot
The method for closing Fig. 2 and Fig. 3 the manufacture lithium ion battery of example embodiment according to the present utility model is described in detail.
The first step, pole piece ingredient: the both ends of the positive plate and negative electrode tab that are coated with active material are respectively kept with positive blank
Collector area and cathode blank collector area, positive pole ear is welded in the positive blank collector area of positive plate one end, is born
Pole tab welding is in the cathode blank collector area of negative electrode tab.
Second step, anode ring forming: according to positive plate, diaphragm, negative electrode tab arrangement mode by positive plate, diaphragm and negative electrode tab
It is wound into battery core.
The spraying of battery core adhesive layer: third step sprays adhesive layer 60 on a side or two sides for battery core.According to
One example embodiment of the utility model, adhesive layer 60 are dotted spraying (referring to Fig. 2).It is according to the present utility model another to show
Example embodiment, the adhesive layer 60 are also possible to wire-like spray (referring to Fig. 3).The adhesive layer 60 of spraying can after spraying process
To solidify quickly, cured adhesive layer 60 has viscosity by high temperature or infiltration electrolyte, so that battery core 10 and packaging bag
20 inner adhesion is integrated, to effectively improve the drop performance of battery.
Battery core encapsulation: the positive pole ear 41 of battery core after winding referring to Fig. 4, is placed in the top surface S1 of battery core by the 4th step
Side at, negative lug 71 is placed at the other side of top surface S1 of battery core, and the gasket 80 on tab is aligned, is passed through
Tab is encapsulated as the gasket on the plastic layer and tab of the packaging bag 20 of metallo-plastic composite membrane.
Battery molding: 5th step referring to Fig. 5, it is whole to be melted into the battery core after fluid injection and completed Vacuum Package, flanging
Shape.Adhesive layer 60 is preferably 2 μm~30 μm in battery extrusion thickness after molding.
The lithium ion battery of the safety of the winding-structure of exemplary embodiment according to the present utility model, by battery core
Outermost layer is provided with the adhesive layer of spraying, and after being assembled into battery, this adhesive layer can be integrated with the inner adhesion of packaging bag, can have
Effect improves the drop performance of battery.
The lithium ion battery of exemplary gift box according to the present utility model, the adhesive layer that the outermost layer of battery core sprays can be with
Very thin thickness, area is very big, and viscosity is very strong, this can largely keep the high-energy density of battery, effectively change in design
The drop performance of kind battery.
The lithium ion battery structure of the safety of the winding-structure of exemplary embodiment according to the present utility model is simple, implements
Convenient, cost is greatly reduced than Double-face gummed paper, and can high-volume automated production.
Claims (8)
1. a kind of safe lithium ion battery, the lithium ion battery includes battery core, the packaging bag and filling for accommodating the battery core
Electrolyte in the packaging bag, the battery core by positive plate, negative electrode tab, setting the positive plate and the negative electrode tab it
Between membrane winding form, it is characterised in that: adhesive layer, the electricity are provided at least one of side surface of the battery core
Core is integrated by the adhesive layer and the inner adhesion of the packaging bag.
2. lithium ion battery according to claim 1, which is characterized in that the adhesive layer is in the side surface of the battery core
Described there is dot pattern at least one.
3. lithium ion battery according to claim 1, which is characterized in that the adhesive layer is in the side surface of the battery core
Described there is linear pattern at least one.
4. lithium ion battery according to claim 3, which is characterized in that the adhesive layer has mesh pattern.
5. lithium ion battery according to claim 1, which is characterized in that the adhesive layer is bent with duplicate serpentine
Linear pattern.
6. lithium ion battery according to claim 1, which is characterized in that the adhesive layer is in battery extrusion thickness after molding
Degree is 2 μm to 30 μm.
7. lithium ion battery according to claim 1, which is characterized in that the lithium ion battery has cylindrical, oval
The shape of cylindricality, polygon cylindricality or pouch-shaped.
8. lithium ion battery according to claim 1, which is characterized in that be provided on the top surface of the battery core and divide each other
The positive pole ear and negative lug separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920397948.3U CN209389154U (en) | 2019-03-27 | 2019-03-27 | A kind of safe lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920397948.3U CN209389154U (en) | 2019-03-27 | 2019-03-27 | A kind of safe lithium ion battery |
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| Publication Number | Publication Date |
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| CN209389154U true CN209389154U (en) | 2019-09-13 |
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ID=67852750
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920397948.3U Active CN209389154U (en) | 2019-03-27 | 2019-03-27 | A kind of safe lithium ion battery |
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| CN (1) | CN209389154U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113875083A (en) * | 2020-12-24 | 2021-12-31 | 宁德新能源科技有限公司 | Battery and electronic device using same |
-
2019
- 2019-03-27 CN CN201920397948.3U patent/CN209389154U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113875083A (en) * | 2020-12-24 | 2021-12-31 | 宁德新能源科技有限公司 | Battery and electronic device using same |
| WO2022133859A1 (en) * | 2020-12-24 | 2022-06-30 | 宁德新能源科技有限公司 | Battery and electronic apparatus using said battery |
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