CN207474561U - A kind of high security lithium ion battery diaphragm and lithium ion battery - Google Patents
A kind of high security lithium ion battery diaphragm and lithium ion battery Download PDFInfo
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- CN207474561U CN207474561U CN201721671855.2U CN201721671855U CN207474561U CN 207474561 U CN207474561 U CN 207474561U CN 201721671855 U CN201721671855 U CN 201721671855U CN 207474561 U CN207474561 U CN 207474561U
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- lithium ion
- ion battery
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- basement membrane
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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 belongs to technical field of lithium ion, more particularly to a kind of high security lithium ion battery diaphragm and lithium ion battery, the battery diaphragm includes isolation basement membrane, the region of the isolation basement membrane face anode ear is provided with the first ceramic of compact coating, and the region of the isolation basement membrane face negative electrode lug is provided with the second ceramic of compact coating.Compared with the prior art, the utility model in diaphragm face tab welding region by increasing by one layer of fine and close ceramic coating, on the one hand, can effectively enhance resistance of the diaphragm to tab burrs, so as to reduce self-discharge of battery phenomenon, improve the safety of battery；On the other hand, it is convenient to omit existing patch insulation glue process so as to effectively improve the packaging efficiency of lithium ion battery, while can reduce battery production cost again.
Description
Technical field
The utility model belong to technical field of lithium ion more particularly to a kind of high security lithium ion battery diaphragm and
Lithium ion battery.
Background technology
Lithium ion battery is since commercialization, since its energy density is high, operating voltage is big, memory-less effect, recycles the longevity
It orders the advantages that long and is widely used as the power supply of various mobile equipment.Wherein, the critical piece of lithium ion battery includes anode, bears
Pole, isolation film and electrolyte, isolation film are spaced between positive and negative anodes, major function：On the one hand, it is physically isolated lithium ion battery
Positive and negative anodes, prevent short circuit occurred inside；On the other hand, ensure lithium ion by electrolyte uniformly, freely travel to and fro between positive and negative anodes
Between.
As shown in Figure 1, existing soft bag lithium ionic cell is generally by positive plate 1 ', isolation film 3 ' and negative plate 2 ' successively layer
Poststack is wound in the same direction, and the plus plate current-collecting body of positive plate 1 ' is welded with anode ear 12 ', the negative pole currect collecting of negative plate 2 '
Body 21 ' is welded with negative electrode lug 22 '.Wherein, positive electrode plate and negative electrode plate of lithium ion battery easily generates burr during soldering polar ear,
Generally by sticking insulating cement 4 ' in tab welding position in lithium ion battery manufacture, for resisting burr, battery oneself is reduced
Electric discharge, process cost is higher, and adhesive tape is mostly plastic adhesive tape, and intensity is poor, and the burr that tab welding generates is easy to pierce
Adhesive tape is worn, leads to battery short circuit.
In view of this, it is necessory to be improved further to existing membrane configuration, to reduce since tab burrs draw
The self-discharge of battery problem risen improves the security performance of lithium ion battery.
Utility model content
The purpose of this utility model is that：In view of the deficiencies of the prior art, a kind of lithium ion battery separator is provided, with drop
The low self-discharge of battery problem caused by tab burrs improves the security performance of lithium ion battery.
To achieve these goals, the utility model is adopted the following technical scheme that：
A kind of high security lithium ion battery diaphragm, including basement membrane, the region of the isolation basement membrane face anode ear is isolated
The first ceramic of compact coating is provided with, the region of the isolation basement membrane face negative electrode lug is provided with the second ceramic of compact coating.
As a kind of improvement of high security lithium ion battery diaphragm described in the utility model, first ceramic of compact
Coating and the second ceramic of compact coating are silica dioxide coating, aluminum oxide coating, zirconia coating, beryllium oxide
Coating, aluminium nitride coating, silicon nitride coating, coat of silicon carbide or vanadium trioxide coating.
As a kind of improvement of high security lithium ion battery diaphragm described in the utility model, first ceramic of compact
The thickness of coating and the second ceramic of compact coating is 2~10 μm.
As a kind of improvement of high security lithium ion battery diaphragm described in the utility model, the thickness of the isolation basement membrane
Spend is 5~30 μm.
As a kind of improvement of high security lithium ion battery diaphragm described in the utility model, the hole of the isolation basement membrane
Gap rate is 30~60%.
As a kind of improvement of high security lithium ion battery diaphragm described in the utility model, the isolation basement membrane is poly-
Alkene film, aramid fiber film or polyimide film.
The beneficial effects of the utility model are：A kind of high security lithium ion battery diaphragm of the utility model, including every
From basement membrane, the region of the isolation basement membrane face anode ear is provided with the first ceramic of compact coating, and the isolation basement membrane face is born
The region of lug is provided with the second ceramic of compact coating.Compared with the prior art, the utility model passes through in diaphragm face lug
Welding position region increases by one layer of fine and close ceramic coating, on the one hand, can effectively enhance diaphragm and lug and pole piece burr are supported
It is anti-, so as to reduce self-discharge of battery phenomenon, improve the safety of battery；On the other hand, it is convenient to omit existing patch insulating cement work
Sequence so as to effectively improve the packaging efficiency of lithium ion battery, while can reduce production cost again.
The another object of the utility model is：A kind of lithium ion battery of high security is provided, including positive plate, cathode
Piece and the diaphragm being spaced between positive plate and negative plate, the positive plate are provided with anode ear, and the negative plate is provided with
Negative electrode lug, the diaphragm are the lithium ion battery separator described in any of the above-described section.
As a kind of improvement of lithium ion battery described in the utility model, the positive plate includes plus plate current-collecting body and painting
The anode active material layer on plus plate current-collecting body is overlayed on, the anode ear is welded on plus plate current-collecting body.
As a kind of improvement of lithium ion battery described in the utility model, the negative plate includes negative current collector and painting
The anode active material layer on negative current collector is overlayed on, the negative pole lug welding is on negative current collector.
Compared with the prior art, the lithium ion battery of the utility model is by setting fine and close pottery in diaphragm face lug region
Porcelain coating, on the one hand, tab burrs can effectively be avoided to pierce through diaphragm and cause battery short circuit problem, so as to which battery be effectively ensured
Security performance；On the other hand, it can save and paste insulation glue process, so as to improve the packaging efficiency of lithium ion battery, reduce lithium
The production cost of ion battery.
Description of the drawings
Fig. 1 is the structure diagram of lithium ion battery in the prior art.
Fig. 2 is the structure diagram of the lithium ion battery separator of the utility model.
Fig. 3 is the structure diagram of the lithium ion battery of the utility model.
In figure：1 '-positive plate；12 '-anode ear；2 '-negative plate；21 '-negative current collector；22 '-negative electrode lug；3 '-isolation
Film；4 '-insulating cement；
Basement membrane is isolated in 1-；11- the first ceramic of compact coatings；12- the second ceramic of compact coatings；2- plus plate current-collecting bodies；21- is just
Lug；22- anode active material layers；3- negative current collectors；31- negative electrode lugs；32- anode active material layers.
Specific embodiment
With reference to embodiment and Figure of description, the utility model is described in further detail, but this practicality
Novel embodiment is without being limited thereto.
Embodiment 1
As shown in Fig. 2, a kind of high security lithium ion battery diaphragm, including basement membrane 1 is isolated, is isolated 1 face anode of basement membrane
The region of ear 21 is provided with the first ceramic of compact coating 11, and the region of isolation 1 face negative electrode lug 31 of basement membrane is provided with the second densification
Ceramic coating 12.Wherein, isolation basement membrane 1 is polyolefin film, aramid fiber film or polyimide film；First ceramic of compact coating 11 and
Two fine and close ceramic coatings 12 are silica dioxide coating, aluminum oxide coating, zirconia coating, beryllium oxide coating, nitridation
Aluminized coating, silicon nitride coating, coat of silicon carbide or vanadium trioxide coating.Compared with the prior art, the utility model by
Diaphragm face tab welding position region increases by one layer of fine and close ceramic coating, on the one hand, can enhance diaphragm to tab burrs
It resists (not needing to lithium ion on lug position to pass through), so as to reduce self-discharge of battery phenomenon, improves the safety of battery；The opposing party
Face, it is convenient to omit existing patch insulation glue process makes battery assembling more efficient, while can reduce production cost again.
Preferably, the thickness of the first ceramic of compact coating 11 and the second ceramic of compact coating 12 is 2~10 μm.
Preferably, the thickness of isolation basement membrane 1 is 5~30 μm；The porosity that basement membrane 1 is isolated is 30~60%.Embodiment 2
As shown in figure 3, a kind of lithium ion battery, including positive plate, negative plate and be spaced in positive plate and negative plate it
Between diaphragm, positive plate is provided with anode ear 21, and negative plate is provided with negative electrode lug 31, and diaphragm is described in the above embodiment 1
Lithium ion battery separator.
Wherein, positive plate includes plus plate current-collecting body 2 and coated in the anode active material layer 22 on plus plate current-collecting body 2, just
Lug 21 is welded on plus plate current-collecting body 2；Negative plate includes negative current collector 3 and lives coated in the cathode on negative current collector 3
Property material layer 32, negative electrode lug 31 are welded on negative current collector 3.
Wherein, plus plate current-collecting body 2 is aluminium foil, and negative current collector 3 is copper foil.
Compared with the prior art, the lithium ion battery of the utility model is by setting fine and close pottery in diaphragm face lug region
Porcelain coating, on the one hand, tab burrs can effectively be avoided to pierce through diaphragm and cause battery short circuit problem, so as to which battery be effectively ensured
Security performance；On the other hand, it can save and paste insulation glue process, so as to improve the packaging efficiency of lithium ion battery, reduce lithium
The production cost of ion battery.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is changed.Therefore, the utility model is not limited to specific embodiment disclosed and described above, right
Some modifications and changes of the utility model should also be as falling into the scope of the claims of the utility model.In addition, to the greatest extent
Some specific terms are used in pipe this specification, but these terms are merely for convenience of description, not to the utility model
Form any restrictions.
Claims (9)
1. a kind of high security lithium ion battery diaphragm, it is characterised in that：Including basement membrane, the isolation basement membrane face anode is isolated
The region of ear is provided with the first ceramic of compact coating, and the region of the isolation basement membrane face negative electrode lug is provided with the second ceramic of compact
Coating.
2. high security lithium ion battery diaphragm according to claim 1, it is characterised in that：First ceramic of compact applies
Layer and the second ceramic of compact coating are silica dioxide coating, aluminum oxide coating, zirconia coating, beryllium oxide painting
Layer, aluminium nitride coating, silicon nitride coating, coat of silicon carbide or vanadium trioxide coating.
3. high security lithium ion battery diaphragm according to claim 1, it is characterised in that：First ceramic of compact applies
The thickness of layer and the second ceramic of compact coating is 2~10 μm.
4. high security lithium ion battery diaphragm according to claim 1, it is characterised in that：The thickness of the isolation basement membrane
It is 5~30 μm.
5. high security lithium ion battery diaphragm according to claim 1, it is characterised in that：The hole of the isolation basement membrane
Rate is 30~60%.
6. high security lithium ion battery diaphragm according to claim 1, it is characterised in that：The isolation basement membrane is polyene
Hydrocarbon film, aramid fiber film or polyimide film.
7. a kind of lithium ion battery, including positive plate, negative plate and the diaphragm being spaced between positive plate and negative plate, institute
It states positive plate and is provided with anode ear, the negative plate is provided with negative electrode lug, it is characterised in that：The diaphragm is claim 1~6
Any one of them lithium ion battery separator.
8. lithium ion battery according to claim 7, it is characterised in that：The positive plate includes plus plate current-collecting body and coating
Anode active material layer on plus plate current-collecting body, the anode ear are welded on plus plate current-collecting body.
9. lithium ion battery according to claim 7, it is characterised in that：The negative plate includes negative current collector and coating
Anode active material layer on negative current collector, the negative pole lug welding is on negative current collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721671855.2U CN207474561U (en) | 2017-12-05 | 2017-12-05 | A kind of high security lithium ion battery diaphragm and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721671855.2U CN207474561U (en) | 2017-12-05 | 2017-12-05 | A kind of high security lithium ion battery diaphragm and lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN207474561U true CN207474561U (en) | 2018-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721671855.2U Active CN207474561U (en) | 2017-12-05 | 2017-12-05 | A kind of high security lithium ion battery diaphragm and lithium ion battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301152A (en) * | 2018-09-30 | 2019-02-01 | 芜湖天弋能源科技有限公司 | A kind of lithium ion battery and its manufacturing process |
| CN112670442A (en) * | 2020-12-24 | 2021-04-16 | 珠海冠宇电池股份有限公司 | Positive plate, battery roll core, battery and positive plate preparation method |
| CN112886066A (en) * | 2021-01-13 | 2021-06-01 | 上海瑞浦青创新能源有限公司 | Lithium ion battery and protection method for improving safety performance of lithium ion battery |
| CN115832605A (en) * | 2021-12-01 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Diaphragm, battery module, battery pack, and electric device |
-
2017
- 2017-12-05 CN CN201721671855.2U patent/CN207474561U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301152A (en) * | 2018-09-30 | 2019-02-01 | 芜湖天弋能源科技有限公司 | A kind of lithium ion battery and its manufacturing process |
| CN112670442A (en) * | 2020-12-24 | 2021-04-16 | 珠海冠宇电池股份有限公司 | Positive plate, battery roll core, battery and positive plate preparation method |
| CN112670442B (en) * | 2020-12-24 | 2023-09-22 | 珠海冠宇电池股份有限公司 | Positive plate, battery winding core, battery and positive plate preparation method |
| CN112886066A (en) * | 2021-01-13 | 2021-06-01 | 上海瑞浦青创新能源有限公司 | Lithium ion battery and protection method for improving safety performance of lithium ion battery |
| CN112886066B (en) * | 2021-01-13 | 2023-02-17 | 上海瑞浦青创新能源有限公司 | Lithium ion battery and protection method for improving safety performance of lithium ion battery |
| CN115832605A (en) * | 2021-12-01 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Diaphragm, battery module, battery pack, and electric device |
| CN115832605B (en) * | 2021-12-01 | 2023-10-10 | 宁德时代新能源科技股份有限公司 | Separator, battery module, battery pack, and electricity-using device |
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