CN107768588A - One kind prevents soft-package battery internal corrosion method and extreme ear structure - Google Patents
One kind prevents soft-package battery internal corrosion method and extreme ear structure Download PDFInfo
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- CN107768588A CN107768588A CN201710893065.7A CN201710893065A CN107768588A CN 107768588 A CN107768588 A CN 107768588A CN 201710893065 A CN201710893065 A CN 201710893065A CN 107768588 A CN107768588 A CN 107768588A
- Authority
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- China
- Prior art keywords
- package battery
- soft
- plastic film
- adhesive layer
- aluminum plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
Abstract
The invention discloses one kind to prevent soft-package battery internal corrosion method and extreme ear structure, and method comprises the following steps：A. the coated with conductive glue-line on the anode ear of soft-package battery, conductive adhesive layer contact with the aluminium lamination of soft-package battery aluminum plastic film；B. the coated insulation glue-line on the negative electrode lug of soft-package battery, is dielectrically separated between negative electrode lug and the aluminum plastic film of soft-package battery.Extreme ear structure includes anode ear and aluminum plastic film, the anode ear is provided with conductive adhesive layer close to the surface of bottom, the length of the conductive adhesive layer is more than or equal to the width of anode ear, described aluminum plastic film includes aluminium lamination and the nylon layer positioned at aluminium lamination outer surface, and the surface of the conductive adhesive layer is bonded with the aluminium lamination of aluminum plastic film.
Description
Technical field
The invention belongs to soft-package battery field, more particularly to one kind to prevent soft-package battery internal corrosion method and extreme ear structure.
Background technology
Soft bag lithium ionic cell with its it is higher than energy, security is good, flexible design the features such as, consumer electronics product lead
Domain and electric automobile field are widely applied.Such as Chinese patent notification number：CN102856580A, disclose a kind of phosphoric acid
Iron lithium soft-package battery and preparation method, it is that LiFePO 4 material and conductive agent, binding agent etc. are mixed into anode sizing agent；Will
Graphite and conductive agent, binding agent etc. mix cathode size.Anode sizing agent is coated on aluminium foil again positive plate, negative pole is made
Negative plate is made in slurry coating on copper foil.Then positive/negative plate addition barrier film is rolled into cylindrical roll core, by core and core
Supplementary module, lug stator, outer lug and aluminum plastic film package material are assembled, and then fluid injection is melted into, finally sealed.
The outer packing of soft pack cell is aluminum plastic film, although can effectively reduce the weight of battery core using aluminum plastic film, is improved
The energy density of battery core, but aluminum plastic film also easy corrosion failure, lose to the protective effect inside battery core.Aluminum plastic film is typically by outer
The nylon layer or pet layer in portion, middle aluminium lamination and internal PP layers composition, internal PP layers play bonding and close in encapsulation process
Envelope acts on.PP layers fragility during melting-solidification can increase, and easily produce micro crack in process.Electrolyte can
These cracks are penetrated into occur directly to contact with aluminium lamination, once the aluminium lamination in aluminum plastic film has electronic loop generation, metallic aluminium with negative pole
Layer will occur to insert lithium reaction, form the very high aluminium lithium alloy of fragility, so as to cause the internal corrosion of soft pack cell, ultimately result in aluminium
Layer ruptures, and loses the insulating effect to moisture.
The content of the invention
The present invention is to overcome above-mentioned deficiency of the prior art, there is provided one kind prevents soft-package battery internal corrosion method
And extreme ear structure.
To achieve these goals, the present invention uses following technical scheme：
One kind prevents soft-package battery internal corrosion method, comprises the following steps：
A. the coated with conductive glue-line on the anode ear of soft-package battery, conductive adhesive layer contact with the aluminium lamination of soft-package battery aluminum plastic film；
B. the coated insulation glue-line on the negative electrode lug of soft-package battery, is dielectrically separated between negative electrode lug and the aluminum plastic film of soft-package battery.
So, turned between the anode ear of soft-package battery and the aluminium lamination of aluminum plastic film by conductive adhesive layer, rather than completely absolutely
The state of edge, the aluminium lamination in aluminum plastic film are maintained at higher current potential, and aluminium lamination is in stable state, while negative electrode lug under high potential
State of insulation is between aluminum plastic film, can avoid that electrochemical reaction occurs between aluminium lamination and negative pole, cause in soft pack cell
Corrosion, improve the security and service life of soft-package battery.
Preferably, in step a, the resistivity of the conductive adhesive layer is less than 0.1G Ω cm.So, conductive adhesive layer has
Certain resistance value, be advantageous to aluminium lamination in aluminum plastic film and keep higher current potential.
Preferably, in step a, the resistance between anode ear and aluminum plastic film aluminium lamination is in 25 to 20000 Ω.
Preferably, in step b, the potential difference between negative electrode lug and aluminum plastic film aluminium lamination is more than or equal to 1.5V.Metallic aluminium with
It can just occur to insert lithium reaction when the potential difference of negative electrode lug is less than 1.5V, it is relatively stable under high potential, by the electricity of aluminum plastic film aluminium lamination
While position is furthered with anode ear, negative electrode lug is insulated with aluminum plastic film aluminium lamination, avoid aluminium lamination from occurring to insert lithium reaction, so as to protect aluminium
Plastic film.
A kind of extreme ear structure for preventing soft-package battery internal corrosion, including anode ear and aluminum plastic film, the anode ear is the bottom of close to
The surface in portion is provided with conductive adhesive layer, and the length of the conductive adhesive layer is more than or equal to the width of anode ear, and described aluminum plastic film includes
Aluminium lamination and the nylon layer positioned at aluminium lamination outer surface, the surface of the conductive adhesive layer are bonded with the aluminium lamination of aluminum plastic film.Anode ear with
Conductive adhesive layer is provided between the aluminium lamination of aluminum plastic film, anode ear is turned on by conductive adhesive layer with aluminum plastic film aluminium lamination so that aluminum plastic film aluminium
Layer can be maintained at high potential, avoid aluminium lamination that electrochemical reaction occurs.
Preferably, described conductive adhesive layer includes the local conducting resinl that stock layer is combined with stock layer
Layer, aluminium lamination of the described local conductive adhesive layer respectively with anode ear surface and aluminum plastic film contact.Stock layer is used to position
Local conductive adhesive layer, ensure that local conductive adhesive layer contacts well with anode ear and aluminium lamination, while local conductive adhesive layer is protected
Shield, improve the reliability of conductive adhesive layer.
Preferably, described conductive adhesive layer includes stock layer and at least one in stock layer leads
Electrical component, described conductive component are positioned in the middle part of stock layer, described conductive component respectively with anode ear surface and
The aluminium lamination contact of aluminum plastic film.
Preferably, described stock layer is the one or more in individual layer PP, individual layer PE, multilayer PP, multilayer PE
Combination.
Preferably, described local conductive adhesive layer is electroconductive stuffing metal material powder or fiber, electrically conductive graphite, led
One or more combination in electric carbon black, conductive carbon fibre.
Preferably, described conductive component is made up of manufacturing silicon carbide semiconductor material.
The beneficial effects of the invention are as follows：The aluminium lamination of aluminum plastic film is in stable state under high potential, avoid aluminum plastic film
Electrochemical reaction occurs between aluminium lamination and negative pole, causes soft pack cell internal corrosion, improves security and the use of soft-package battery
Life-span.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the structural representation of the embodiment of the present invention 2；
Fig. 3 is the structural representation of the embodiment of the present invention 3.
In figure：Anode ear 1, conductive adhesive layer 2, stock layer 2a, local conductive adhesive layer 2b, conductive component 2c.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
One kind prevents soft-package battery internal corrosion method, comprises the following steps：
A. the coated with conductive glue-line on the anode ear of soft-package battery, the resistivity of conductive adhesive layer are less than 0.1G Ω cm, conducting resinl
Layer contacts with the aluminium lamination of soft-package battery aluminum plastic film, anode ear and aluminum plastic film aluminium lamination can be detected after installing conductive adhesive layer, really
The resistance protected between anode ear and aluminum plastic film aluminium lamination is in 25 to 20000 Ω.
B. the coated insulation glue-line on the negative electrode lug of soft-package battery, insulate between negative electrode lug and the aluminum plastic film of soft-package battery
Isolation, negative electrode lug and aluminum plastic film aluminium lamination can be detected after insulation glue-line is installed, it is ensured that between negative electrode lug and aluminum plastic film aluminium lamination
Potential difference be more than or equal to 1.5V, battery is in 50% state-of-charge.
Embodiment 1
In embodiment as shown in Figure 1, a kind of extreme ear structure for preventing soft-package battery internal corrosion, including anode ear 1 and aluminum plastic film,
Anode ear is rectangular, and anode ear is provided with conductive adhesive layer 2, width cloth of the conductive adhesive layer along anode ear close to the surface of bottom
Put, the length of conductive adhesive layer is more than or equal to the width of anode ear.Aluminum plastic film includes aluminium lamination and the nylon positioned at aluminium lamination outer surface
Layer.Conductive adhesive layer includes stock layer and local conductive adhesive layer, and stock layer is individual layer PP, individual layer PE, multilayer PP, multilayer
One or more combinations in PE.Local conductive adhesive layer is conductive metallic material powder or fiber, electrically conductive graphite, conductive charcoal
One or more combination in black, conductive carbon fibre.Local conductive adhesive layer forms composite with stock layer, local conductive
Aluminium lamination of the glue-line respectively with anode ear surface and aluminum plastic film contacts.
During actual installation, conductive adhesive layer cladding is pasted onto on anode ear, conductive adhesive layer and anode ear conducting, simultaneously
The surface of conductive adhesive layer is bonded with the aluminium lamination of aluminum plastic film, and the resistivity of conductive adhesive layer is less than 0.1G Ω cm, and anode ear and aluminium
Resistance between plastic film aluminium lamination is in 25 to 20000 Ω.Anode ear is turned on by conductive adhesive layer with the aluminium lamination of aluminum plastic film so that aluminium lamination
It is maintained at high potential.
Embodiment 2
In embodiment as shown in Figure 2, a kind of extreme ear structure for preventing soft-package battery internal corrosion, including anode ear 1 and aluminum plastic film,
Anode ear is rectangular, and anode ear is provided with conductive adhesive layer 2, width cloth of the conductive adhesive layer along anode ear close to the surface of bottom
Put, the length of conductive adhesive layer is more than or equal to the width of anode ear.Aluminum plastic film includes aluminium lamination and the nylon positioned at aluminium lamination outer surface
Layer, the surface of conductive adhesive layer is bonded with the aluminium lamination of aluminum plastic film.
Conductive adhesive layer includes stock layer 2a and local conductive adhesive layer 2b, and stock layer is individual layer PP, individual layer PE, more
One or more combinations in layer PP, multilayer PE.Local conductive adhesive layer is conductive metallic material powder or fiber, conductive stone
One or more combination in ink, conductive black, conductive carbon fibre.Local conductive adhesive layer is rectangular, and is located at stock layer
Inside, aluminium lamination of the local conductive adhesive layer respectively with anode ear surface and aluminum plastic film contact.
During actual installation, conductive adhesive layer cladding is pasted onto on anode ear, conductive adhesive layer and anode ear conducting, simultaneously
The surface of conductive adhesive layer is bonded with the aluminium lamination of aluminum plastic film, and the resistivity of conductive adhesive layer is less than 0.1G Ω cm, and anode ear and aluminium
Resistance between plastic film aluminium lamination is in 25 to 20000 Ω.Anode ear is turned on by conductive adhesive layer with the aluminium lamination of aluminum plastic film so that aluminium lamination
It is maintained at high potential.
Embodiment 3
In embodiment as shown in Figure 3, a kind of extreme ear structure for preventing soft-package battery internal corrosion, including anode ear 1 and aluminum plastic film,
Anode ear is rectangular, and anode ear is provided with conductive adhesive layer 2, width cloth of the conductive adhesive layer along anode ear close to the surface of bottom
Put, the length of conductive adhesive layer is more than or equal to the width of anode ear.Aluminum plastic film includes aluminium lamination and the nylon positioned at aluminium lamination outer surface
Layer, the surface of conductive adhesive layer is bonded with the aluminium lamination of aluminum plastic film.
Conductive adhesive layer includes stock layer 2a and two conductive component 2c, and stock layer is individual layer PP, individual layer PE, more
One or more combinations in layer PP, multilayer PE.Conductive component is made up of manufacturing silicon carbide semiconductor material.Conductive component is positioned at
Inside stock layer, aluminium lamination of the conductive component respectively with anode ear surface and aluminum plastic film contacts.
During actual installation, conductive adhesive layer cladding is pasted onto on anode ear, conductive adhesive layer and anode ear conducting, simultaneously
The surface of conductive adhesive layer is bonded with the aluminium lamination of aluminum plastic film, and the resistivity of conductive adhesive layer is less than 0.1G Ω cm, and anode ear and aluminium
Resistance between plastic film aluminium lamination is in 25 to 20000 Ω.Anode ear is turned on by conductive adhesive layer with the aluminium lamination of aluminum plastic film so that aluminium lamination
It is maintained at high potential.
Claims (10)
1. one kind prevents soft-package battery internal corrosion method, comprise the following steps：
A. the coated with conductive glue-line on the anode ear of soft-package battery, conductive adhesive layer contact with the aluminium lamination of soft-package battery aluminum plastic film；
B. the coated insulation glue-line on the negative electrode lug of soft-package battery, is dielectrically separated between negative electrode lug and the aluminum plastic film of soft-package battery.
2. one kind according to claim 1 prevents soft-package battery internal corrosion method, it is characterized in that, in step a, the conduction
The resistivity of glue-line is less than 0.1G Ω cm.
3. one kind according to claim 1 prevents soft-package battery internal corrosion method, it is characterized in that, in step a, anode ear with
Resistance between aluminum plastic film aluminium lamination is in 25 to 20000 Ω.
4. one kind according to claim 1 prevents soft-package battery internal corrosion method, it is characterized in that, in step b, negative electrode lug and
Potential difference between aluminum plastic film aluminium lamination is more than or equal to 1.5V.
5. a kind of extreme ear structure for preventing soft-package battery internal corrosion, it is characterized in that, including anode ear（1）And aluminum plastic film, it is described just
Lug（1）Conductive adhesive layer is provided with close to the surface of bottom（2）, the conductive adhesive layer（2）Length be more than or equal to anode ear（1）'s
Width, described aluminum plastic film include aluminium lamination and the nylon layer positioned at aluminium lamination outer surface, the conductive adhesive layer（2）Surface and aluminium
The aluminium lamination fitting of plastic film.
6. a kind of extreme ear structure for preventing soft-package battery internal corrosion according to claim 5, it is characterized in that, described conduction
Glue-line（2）Including stock layer（2a）And with stock layer（2a）The local conductive adhesive layer being combined（2b）, it is described
Local conductive adhesive layer（2b）Respectively with anode ear（1）The aluminium lamination of surface and aluminum plastic film contacts.
7. a kind of extreme ear structure for preventing soft-package battery internal corrosion according to claim 5, it is characterized in that, described conduction
Glue-line（2）Including stock layer（2a）And positioned at stock layer（2a）Interior at least one conductive component（2c）, it is described
Conductive component（2c）It is positioned at stock layer（2a）Middle part, described conductive component（2c）Respectively with anode ear（1）Surface
And the aluminium lamination contact of aluminum plastic film.
8. a kind of extreme ear structure for preventing soft-package battery internal corrosion according to claim 6 or 7, it is characterized in that, it is described
Stock layer（2a）For one or more combinations in individual layer PP, individual layer PE, multilayer PP, multilayer PE.
9. a kind of extreme ear structure for preventing soft-package battery internal corrosion according to claim 6, it is characterized in that, described part
Conductive adhesive layer（2b）For one kind in electroconductive stuffing metal material powder or fiber, electrically conductive graphite, conductive black, conductive carbon fibre
Or a variety of combination.
10. a kind of extreme ear structure for preventing soft-package battery internal corrosion according to claim 7, it is characterized in that, described leads
Electrical component（2c）It is made up of manufacturing silicon carbide semiconductor material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710893065.7A CN107768588A (en) | 2017-09-27 | 2017-09-27 | One kind prevents soft-package battery internal corrosion method and extreme ear structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710893065.7A CN107768588A (en) | 2017-09-27 | 2017-09-27 | One kind prevents soft-package battery internal corrosion method and extreme ear structure |
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| CN107768588A true CN107768588A (en) | 2018-03-06 |
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| CN201710893065.7A Pending CN107768588A (en) | 2017-09-27 | 2017-09-27 | One kind prevents soft-package battery internal corrosion method and extreme ear structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109148744A (en) * | 2018-10-18 | 2019-01-04 | 天津中聚新能源科技有限公司 | A kind of assembling structure of soft-package battery |
| CN110137521A (en) * | 2019-05-22 | 2019-08-16 | 湖南科霸汽车动力电池有限责任公司 | The measuring method of soft-package battery aluminum plastic film punching press limit depth |
| CN113871808A (en) * | 2021-10-25 | 2021-12-31 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN117458054A (en) * | 2023-12-25 | 2024-01-26 | 中航锂电（洛阳）有限公司 | Partial pressure structure, battery monomer, battery and power consumption device |
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| CN101707243A (en) * | 2009-07-15 | 2010-05-12 | 深圳市海太阳实业有限公司 | Method for controlling corrosion on package aluminum coating of lithium ion flexible package battery cell |
| CN104393227A (en) * | 2014-12-10 | 2015-03-04 | 天津力神电池股份有限公司 | Secondary battery |
| CN207558918U (en) * | 2017-09-27 | 2018-06-29 | 浙江超威创元实业有限公司 | A kind of extreme ear structure for preventing soft-package battery internal corrosion |
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2017
- 2017-09-27 CN CN201710893065.7A patent/CN107768588A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707243A (en) * | 2009-07-15 | 2010-05-12 | 深圳市海太阳实业有限公司 | Method for controlling corrosion on package aluminum coating of lithium ion flexible package battery cell |
| CN104393227A (en) * | 2014-12-10 | 2015-03-04 | 天津力神电池股份有限公司 | Secondary battery |
| CN207558918U (en) * | 2017-09-27 | 2018-06-29 | 浙江超威创元实业有限公司 | A kind of extreme ear structure for preventing soft-package battery internal corrosion |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109148744A (en) * | 2018-10-18 | 2019-01-04 | 天津中聚新能源科技有限公司 | A kind of assembling structure of soft-package battery |
| CN110137521A (en) * | 2019-05-22 | 2019-08-16 | 湖南科霸汽车动力电池有限责任公司 | The measuring method of soft-package battery aluminum plastic film punching press limit depth |
| CN113871808A (en) * | 2021-10-25 | 2021-12-31 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN113871808B (en) * | 2021-10-25 | 2024-03-26 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN117458054A (en) * | 2023-12-25 | 2024-01-26 | 中航锂电（洛阳）有限公司 | Partial pressure structure, battery monomer, battery and power consumption device |
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