CN109273776A - A kind of battery core film bag packaging method, battery preparation method and battery - Google Patents
A kind of battery core film bag packaging method, battery preparation method and battery Download PDFInfo
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- CN109273776A CN109273776A CN201811093797.9A CN201811093797A CN109273776A CN 109273776 A CN109273776 A CN 109273776A CN 201811093797 A CN201811093797 A CN 201811093797A CN 109273776 A CN109273776 A CN 109273776A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to battery technology field, a kind of battery core film bag packaging method, battery preparation method and battery are specifically disclosed, wherein battery core bag packaging method includes the following steps: that preparing cathode metal film and cathode metallic film two opens metal film；The conductive part of metal material layer is exposed in setting on the insulation hot sealing layer of metal film, and the tab portion of metal material layer is exposed in setting on the insulation hot sealing layer of metal film or on insulating protective layer；It seals at least side of two metal films to form packaging film bag；The battery core of no tab is placed in packaging film bag, and contacts the metal material layer at the conductive part of cathode metal film with the plus plate current-collecting body of battery core, the metal material layer at the conductive part of cathode metallic film is contacted with negative current collector；The unclosed side of heat sealed package film bag and reserved liquid injection port.Battery core film bag packaging method, battery preparation method and battery disclosed by the invention can be improved the quality of battery core encapsulation, reduce the integral thickness of battery.
Description
Technical field
The present invention relates to battery technology field more particularly to a kind of battery core film bag packaging methods, battery preparation method and electricity
Pond.
Background technique
With the rapid development of the progress in epoch and wearing and portable intelligent electronic product, ultra-thin serondary lithium battery is wide
It is general to be applied to wearing class and intelligent cards equipment, people for battery it is also proposed that more requirements, it would be desirable to meeting battery
While the energy density needed, can also cell thickness be made to get over Bao Yuehao.
The prior art provides a kind of electrodeless lug lithium ion battery comprising positive conductive encapsulating film, negative conductive encapsulation
Film and the battery core being packaged between positive conductive encapsulating film and negative conductive encapsulating film, the positive plate on battery core surface layer are provided with anode
Blank foil area, the negative electrode tab on battery core surface layer are provided with cathode blank foil area, and the inner surface of positive conductive encapsulating film is provided with
First welding section, the inner surface of negative conductive encapsulating film are provided with the second welding section, positive blank foil area and the first welding section
Welding, cathode blank foil area and the second welding section are welded.
Prior art discloses electrodeless lug lithium ion battery, make positive conductive encapsulating film and negative conductive encapsulating film respectively at
The thickness of battery is reduced for a part of anode and cathode so as to not have to additional setting positive pole ear and negative lug.
But since battery core and positive conductive encapsulating film and battery core and negative conductive encapsulating film are using welded connecting, and it is welded on battery core
When film bag encapsulates, the difficulty of welding is improved, process complexity is increased, and is easy to appear rosin joint, welds the problems such as not tight,
It is unfavorable so as to cause connecting insecure problem between battery core and positive conductive encapsulating film and battery core and negative conductive encapsulating film
In the permanent stable operation of battery；And since battery core and conductive enclosure film are welded to connect, cause between battery core and conductive enclosure film
Thickness increases, and is unfavorable for further decreasing for cell thickness.
Summary of the invention
It is an object of the present invention to provide a kind of battery core film bag packaging methods, improve the encapsulation product without tab battery core
Matter reduces the integral thickness of battery, simplifies the manufacturing process of battery core.
Another object of the present invention is to provide a kind of battery preparation methods to reduce electricity to improve the quality of battery core encapsulation
The integral thickness in pond improves the reliability of battery, simplifies the processing technology of battery.
Another object of the present invention is to provide a kind of batteries to improve the reliable of battery to reduce the integral thickness of battery
Property, simplify the processing technology of battery.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of battery core film bag packaging method, includes the following steps:
Prepare two metal films, and one in two metal films is positive metal film, another is negative metal
Film, the metal film include the insulating protective layer being cascading, metal material layer and insulation hot sealing layer；
The conductive part of the metal material layer is exposed in setting on the insulation hot sealing layer of the metal film, in the metal film
The tab portion for exposing the metal material layer is set on insulation hot sealing layer or on the insulating protective layer；
It seals at least side of two metal films to form packaging film bag；
The battery core of no tab is placed in the packaging film bag, and is made at the conductive part of the cathode metal film
The metal material layer is contacted with the plus plate current-collecting body of the battery core, the metal at the conductive part of the cathode metallic film
Material layer is contacted with negative current collector；
Seal the unclosed side of the packaging film bag and reserved liquid injection port.
Further, the tab portion is arranged on the insulation hot sealing layer, and the tab portion is located at the institute after encapsulation
The outside of battery core is stated, and the tab portion of the cathode metal film and the tab portion of the cathode metallic film are wrong after encapsulation
Position.
Further, the tab portion is arranged on the insulating protective layer.
Further, the metal film includes the body region being disposed adjacent and airbag area, and the conductive part is arranged described
Body region, the area of the body region are greater than the area of the side of the battery core.
A kind of battery preparation method is encapsulated using the film bag that battery core film bag packaging method as described above carries out battery core.
It further, further include forming anode pole piece and cathode pole piece before battery core film bag encapsulation, the formation
Anode pole piece and cathode pole piece include the following steps:
Positive electrode coating is laid on the two sides of the plus plate current-collecting body, the anode pole piece is made to form the first of tool two sides dressing
Positive section and the second positive section with a face dressing；
Cathode coating is laid on the two sides of the negative current collector, forming the cathode pole piece has the of two sides dressing
One cathode section and the second cathode section with a face dressing.
Further, the two sides dressing of the plus plate current-collecting body is respectively the first anode dressing layer and the second anode dressing
Layer, the first anode dressing layer is aligned with one end of the second anode dressing layer, and the length of the first anode dressing layer
Degree is greater than the length of the second anode dressing layer；
The two sides dressing of the negative current collector is respectively the first cathode dressing layer and the second cathode dressing layer, and described first
Cathode dressing layer is aligned with one end of the second cathode dressing layer, and the length of the first cathode dressing layer is greater than described the
The length of two cathode dressing layers.
Further, the both ends of the first cathode dressing layer are aligned with the both ends of the negative current collector, and described first
One end of anode dressing layer is aligned with one end of the plus plate current-collecting body, the other end of the first anode dressing layer and it is described just
The other end of pole collector is at a distance of pre-determined distance.
Further, after the formation anode pole piece and cathode pole piece and before battery core film bag encapsulation, also
Form battery core including winding, the winding form battery core the following steps are included:
Cathode pole piece, diaphragm and anode pole piece are sequentially overlapped placement from bottom to up, make the second cathode section with it is described
First positive section is staggered relatively, and the first cathode section and the second positive section are located at the two of the described first positive section
Side, the first cathode dressing layer and the second anode dressing layer are located at the two sides of diaphragm, and the first cathode dressing layer is located at
The upside of the negative current collector；
First cathode section bending is superimposed to the top of the described first positive section；
So that the diaphragm bending positioned at described first cathode section one end is coated the first cathode dressing layer and makes described
One end of diaphragm extends to the lower section of the second cathode section；
Described second positive section and the diaphragm positioned at described second positive section one end are bent to first cathode
The top of dressing layer.
A kind of battery is made of battery preparation method as described above.
The beneficial effects of the present invention are:
Battery core film bag packaging method provided by the invention forms film to folded by setting cathode metal film and cathode metallic film
Bag, positive pole ear portion and negative lug portion are respectively set on cathode metal film and cathode metallic film, can make cathode metal film
With cathode metallic film itself respectively as a part of anode pole piece and cathode pole piece, avoid in plus plate current-collecting body and cathode collection
Positive pole ear and negative lug are additionally set on fluid, simplify the production technology of battery, simultaneously because tab is not necessarily to from battery core
Middle stretching reduces the integral thickness of battery；And by the way that conductive part and tab portion are arranged on metal film, without being connected by welding
Connect metal film and anode pole piece or cathode pole piece, simplify the packaging technology of packaging film bag, and be not in because welding caused by
The problem of thickness increases.
Battery preparation method provided by the invention improves battery by using above-mentioned battery core film bag packaging method
Forming quality reduces the integral thickness of battery, simplifies the production technology of battery.
Battery provided by the invention reduces the integral thickness of battery by using above-mentioned battery preparation method.
Detailed description of the invention
Fig. 1 is the flow chart for the battery preparation method that the embodiment of the present invention one provides；
Fig. 2 is the schematic front view of anode pole piece and cathode pole piece that the embodiment of the present invention one provides；
Fig. 3 is the schematic diagram of a layer structure for the battery core that the embodiment of the present invention one provides；
Fig. 4 is the structural schematic diagram for the cathode metal film that the embodiment of the present invention one provides；
Fig. 5 is the structural schematic diagram for the cathode metallic film that the embodiment of the present invention one provides；
Fig. 6 is the structural schematic diagram for the battery that the embodiment of the present invention one provides；
Fig. 7 is the flow chart of battery preparation method provided by Embodiment 2 of the present invention；
Fig. 8 is the structural schematic diagram of battery core provided by Embodiment 2 of the present invention.
It is marked in figure as follows:
1- battery core；2- packaging film bag；3- fixes glue；
11- anode pole piece；12- cathode pole piece；13- diaphragm；
21- cathode metal film；22- cathode metallic film；
111- plus plate current-collecting body；112- the first anode dressing layer；113- the second anode dressing layer；121- negative current collector；
122- the first cathode dressing layer；123- the second cathode dressing layer；211- anode body region；The first airbag of 212- area；213- anode
Tab area；214- positive conductive portion；215- positive pole ear portion；221- cathode body region；The second airbag of 222- area；223- cathode pole
Ear field；224- negative conductive portion；225- negative lug portion.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is the flow chart of battery preparation method provided in an embodiment of the present invention, as shown in Figure 1, present embodiments providing
A kind of battery preparation method, improving the encapsulation of battery, simplifying the manufacturing process of battery and reducing the thickness of battery.
As shown in Figure 1, battery preparation method provided in this embodiment includes the following steps:
Step S1: anode pole piece 11 and cathode pole piece 12 are formed.
Fig. 2 is the schematic front view of anode pole piece 11 and cathode pole piece 12 provided in this embodiment, and wherein a is positive in Fig. 2
The schematic diagram of pole pole piece 11, b is the schematic diagram of cathode pole piece 12 in Fig. 2, in Fig. 2 shown in (a) figure, it is provided in this embodiment just
Pole pole piece 11 is formed using 111 two sides of plus plate current-collecting body coating positive electrode coating.Specifically, plus plate current-collecting body 111 is set on one side
It is equipped with the first anode dressing layer 112, the another side of plus plate current-collecting body 111 is provided with the second anode dressing layer 113, and the first anode applies
First positive terminal of the bed of material 112 with the second anode dressing layer 113 in plus plate current-collecting body 111 is aligned, and the first anode dressing layer 112
Length be greater than the length of the second anode dressing layer 113, make anode pole piece 11 formed the first positive section with the double-deck dressing and
The second positive section with single layer dressing.
In the present embodiment, it is preferred that collect the first anode dressing layer 112 and the second anode dressing layer 113 with anode
First positive terminal of fluid 111 is aligned, the length of the second anode dressing layer 113 according to required battery width and determine, first
Second positive terminal distance of anode dressing layer 112 and plus plate current-collecting body 111 is greater than 3mm, the process for preventing battery core 1 from rolling
In, anode dressing layer can not be completely covered in cathode dressing layer in the width direction of battery.
In Fig. 2 shown in (b) figure, cathode pole piece 12 is formed using 121 two sides of negative current collector coating cathode coating.Tool
Body, negative current collector 121 is provided with the first cathode dressing layer 122 on one side, and the another side of negative current collector 121 is provided with
The first cathode of two cathode dressing layers 123, the first cathode dressing layer 122 and the second cathode dressing layer 123 in negative current collector 121
End alignment, the length of the second cathode dressing layer 123 make cathode pole piece 12 form tool less than the length of the first cathode dressing layer 122
There are the first cathode section of dual-coating and the second cathode section with single layer coating.
In this embodiment, it is preferred that by one end of the first cathode dressing layer 122 and one end of the second cathode dressing layer 123
It is aligned with one end of negative current collector 121, the other end of the first cathode dressing layer 122 and the other end pair of negative current collector 121
Together, it is advantageously implemented the utilization rate of negative current collector 121, the width of the second cathode dressing layer 123 should be according to the required width of battery
Degree setting, and the length of the second cathode dressing layer 123 is greater than the length of the second anode dressing layer 113.
In the present embodiment, the positive electrode coating phase that the first anode dressing layer 112 and the second anode dressing layer 113 are laid
Together, the cathode coating that the first cathode dressing layer 122 and the second cathode dressing layer 123 are laid is identical.
In the present embodiment, anode pole piece 11 is formed with cathode pole piece 12 using die-cutting process, by large stretch of anode pole piece
11 and cathode pole piece 12 cut the anode pole piece 11 and cathode pole piece 12 to form required size.
In the present embodiment, plus plate current-collecting body 111 is made of aluminium foil, and negative current collector 121 is made of copper foil.At it
In his embodiment, plus plate current-collecting body 111 and negative current collector 121 can also be using the material systems of other negative discharges that can be positive
At.
Step S2: winding forms battery core 1.
Anode pole piece 11, diaphragm 13 and the winding of cathode pole piece 12 form naked battery core.Specifically, Fig. 3 is the embodiment of the present invention
The schematic diagram of a layer structure of the battery core 1 of offer, as shown in figure 3, battery core 1 winding the following steps are included:
Step S201: cathode pole piece 12, diaphragm 13 and anode pole piece 11 are sequentially overlapped placement from bottom to up；
Specifically, the second cathode section of cathode pole piece 12 and the first positive section of anode pole piece 11 is staggered relatively, and the
One cathode dressing layer 122 is located at the upside of negative current collector 121, and the first cathode dressing layer 122 divides with the second anode dressing layer 113
Not Wei Yu diaphragm 13 two sides.First cathode dressing layer 122 covers the second anode dressing layer 113 in its longitudinal direction.
Step S202: by the first cathode section and the diaphragm 13 at the first cathode section, bending is being superimposed to first just clockwise
The top of pole section, the first cathode dressing layer 122 and the first anode dressing layer 112 are located at the two sides of diaphragm 13 at this time, and second
Cathode dressing layer 123 is located at the upside of negative current collector 121.
Step S203: the bending winding counterclockwise of the diaphragm 13 at first cathode section one end will be located at, wrap diaphragm 13 completely
It covers the first cathode dressing layer 122 and part coats the negative current collector 111 of the second cathode section, and extend to one end of diaphragm 13
The lower section of the negative current collector 121 of second cathode section, and diaphragm 13 is located at the length of the part of the lower section of negative current collector 121 and is less than
The 1/3 of battery core width avoids battery core 1 and 2 poor contact of packaging film bag and leads to insulation open circuit.
Step S204: the second positive section and the diaphragm 13 positioned at second positive section one end are bent counterclockwise, are made second just
The major part of pole section is superimposed to the top of the first cathode section, at this point, the second cathode dressing layer 123 is in the width direction of battery core 1
Covering is located at the first anode dressing layer 112 and plus plate current-collecting body 111 above the first cathode section.And at this time diaphragm 13 close to second
One end of positive section is located at the top of the second positive section, and diaphragm 13 is located at the of length no more than of the part above the second positive section
The 1/3 of 1 width of battery core avoids battery core 1 and the poor contact of packaging film bag and leads to insulation open circuit.
Step S205: using the both ends of the fixed diaphragm 13 of fixed glue 3 and fixed anode pole piece 11 and cathode pole piece 12
Outer end.Specifically, make the both ends of diaphragm 13 respectively at corresponding plus plate current-collecting body 111 and negative current collector 121 by fixed glue 3
Bonding, the outer end of anode pole piece 11 and cathode pole piece 12 respectively with 13 bonding connection of diaphragm, to make diaphragm 13, anode pole piece 11
It is connected as one with cathode pole piece 12.
The battery core 1 rolled using the above method, outermost two layers of battery core 1 is respectively plus plate current-collecting body 111 and cathode collection
Fluid 121.And due to anode pole piece 11 and cathode pole piece 12 only carried out half-turn folded roll around, make battery core 1 along its thickness
Dressing layer on degree direction only has six layers, 13 layers of diaphragm only three layers, reduce 1 dressing layer of battery core the number of plies and 13 layers of diaphragm
The number of plies, so as to effectively reduce the thickness of battery core 1, even if the integral thickness of battery can do it is relatively thin.Using our legal system
The thickness of standby battery core 1 can accomplish 0.3mm hereinafter, being conducive to the preparation of slimline battery.
In the present embodiment, the descriptions such as clockwise, counterclockwise used in foregoing description are based on anode pole piece shown in Fig. 3
11 and cathode pole piece 12 setting direction, in practice, the setting position of anode pole piece 11 and cathode pole piece 12 and Fig. 3 institute
When the position difference shown, the clockwise order or counter clockwise direction of bending can be with the differences of foregoing description.
Step S3: battery core film bag encapsulation.
Specifically, include the following steps:
Step S301: prepare cathode metal film 21 and cathode metallic film 22 respectively；
Preparing two metal films, one in two metal films is positive metal film 21, and another is cathode metallic film 22,
And every metal film includes the insulating protective layer being cascading, metal material layer and insulation hot sealing layer.
In the present embodiment, cathode metal film 21 is identical with the layer structure of cathode metallic film 22, and insulating protective layer and absolutely
The material of edge hot sealing layer is identical, the difference is that the metal material of metal material layer is different.
In the present embodiment, the metal material of the metal material layer of cathode metal film 21 is aluminium foil, with plus plate current-collecting body 11
Material it is consistent.The metal material of metal film 22 is copper foil, consistent with the material of negative current collector 12, so as to make anode
The a part of metal film 21 as anode pole piece 11, a part of cathode metallic film 22 as cathode pole piece 12, and can be realized
Satisfactory electrical conductivity between plus plate current-collecting body 11 and cathode metal film 21 and negative current collector 12 and cathode metallic film 22.At it
In his embodiment, the material of the metal material layer of cathode metal film 21 can also be aluminium alloy, the metal material layer of cathode metallic film 21
Material can be for nickel etc..
In the present embodiment, insulate hot sealing layer material be CPP insulate heat-seal adhesive, in other embodiments, insulation heat-sealing
The material of layer can also be that can be realized insulation and the hot other materials for melting seal.
Step S302: conductive part and tab portion are set on metal film；
The conductive part of metal material layer is exposed in setting on the insulation hot sealing layer of metal film, on the insulation hot sealing layer of metal film
Or the tab portion of metal material layer is exposed in setting on insulating protective layer.
Specifically, Fig. 4 is the structural schematic diagram of cathode metal film 21 provided in an embodiment of the present invention, and Fig. 5 is that the present invention is real
The structural schematic diagram of the cathode metallic film 22 of example offer is provided.As shown in Figures 4 and 5, cathode metal film 21 and cathode metallic film 22 are equal
For the laminated structure of rectangle, cathode metal film 21 includes the positive body region 211 and the first airbag area 212 being disposed adjacent, anode
The side of body region 211 is provided with tab area 213.Cathode metallic film 22 includes the cathode body region 221 and second being disposed adjacent
Negative lug area 223 is arranged in the side in airbag area 222, cathode body region 221.
In the present embodiment, for placing battery core 1, the area of positive body region 221 and cathode body region 222 is equal for body region
Greater than the area of 1 side of battery core, positive body region 221 and cathode body region 222 are corresponding with the two sides of battery core 1 respectively.Airbag
Area is used to collect the gas and electrolyte more than needed generated when the chemical conversion of 1 fixture of battery core.Tab area makes battery core for tab portion to be arranged
After encapsulation, tab portion can be located at the outside of battery core 1, and battery core 1 is facilitated to pass through tab portion and external electrical connections.
In the present embodiment, conductive part and tab portion are arranged on insulation hot sealing layer, and conductive part is arranged in body region,
Tab portion is arranged in tab area, is conducive to the processing to metal film and the setting of conductive part and tab portion.That is cathode metal film
21 are provided with positive conductive portion 214 and positive pole ear portion 215 on one side, and cathode metallic film 22 is provided with negative conductive portion on one side
224 and negative lug portion 225.
In other embodiments, conductive part can be arranged on the insulation hot sealing layer of metal film, the setting of tab portion is existed
On the insulating protective layer of metal film, to make conductive part and tab portion be located at the two sides of metal film, at this point it is possible to be not provided with tab
Area, and tab portion can be set and correspond to any position of body region in insulating protective layer, be conducive to the body of battery core after reduction encapsulation
Product.But it due to needing to process tab portion and conductive part respectively in the two sides of metal film, compares and tab is set in the side of metal film
Portion and conductive part increase the difficulty of processing of metal film.
In the present embodiment, tab area and airbag the area side that be located at body region adjacent, in other embodiments, pole
Ear field and airbag area can also be divided into positioned at the opposite side in body region, as long as body region and airbag can be made to distinguish every making battery core 1
After encapsulation, tab area is located at the outside of the battery core 1 after encapsulation.
In the present embodiment, in figures 4 and 5, positive conductive portion 214 and negative conductive portion 224 are circle, positive pole
Ear 215 and negative lug portion 216 are rectangle, and in other embodiments, the shape in conductive part and tab portion can be arbitrary shape
Shape, as long as the metal material layer at where being able to achieve conductive part sufficiently connects with corresponding plus plate current-collecting body 111 or negative current collector 112
Touching, the present embodiment are not particularly limited.
Step S303: two panels metal film is subjected to the packaging diaphragm that cross cutting forms suitable size；
Step S304: it seals at least side of two metal films to form packaging film bag 2；
Specifically, cathode metal film 21 is provided with the one side of insulation hot sealing layer and cathode metallic film 22 is provided with insulation heat
The one side of sealing is opposite to be superposed, and make positive body region 211 with cathode body region 221 opposite, the first airbag area 212 and the
Two airbag areas 222 are opposite and positive pole ear area 213 is opposite with negative lug area 223, and positive pole ear portion 215 and negative lug
Portion 225 shifts to install.
Cathode metal film 21 and cathode metallic film 22 in body region and carry out soft envelope with the intersection in tab area or seal heat firmly
Seal is sealed, and hot-sealing line traverses the airbag area of metal film, the packaging film bag formation for forming heat-sealing is located at hot-sealing line side and use
In the packaging bag area of cladding battery core 1 and positioned at the side zones of the hot-sealing line other side, and body region and the most equal position in airbag area
In packaging bag area, tab area and airbag the area region adjacent with tab area are located at side zones.
In the present embodiment, when heat-sealing forms packaging film bag 2, only the side of metal film can be sealed, i.e. tab
The intersection of area and body region is sealed, and placement of the battery core 1 in packaging film bag 2 is facilitated.It in other embodiments, can also be with
Two sides or three sides to metal film carry out heat-sealing and form packaging film bag 2, as long as battery core 1 can be made to be placed on the packaging of packaging film bag 2
In bag area.
Step S305: dress battery core 1；
Battery core 1 is placed in the packaging film bag 2 sealed, keeps plus plate current-collecting body 111 and positive body region 211 opposite,
And plus plate current-collecting body 111 is contacted with the metal material layer where positive conductive portion 214；Make negative current collector 121 and cathode main body
Area 221 is opposite, and negative current collector 121 is contacted with the metal material layer where negative conductive portion 224.
Step S306: encapsulation；
The unclosed side of heat sealed package film bag 2 and reserved liquid injection port.Specifically, by positive body region 211 and the first gas
The opposite side in bag 212 place side of the area side opposite with 222 place side of the second airbag area with cathode body region 221 is sealed
Seal, by the side opposite with 213 place side of positive pole ear area of cathode metal film 21 and cathode metallic film 22 and negative lug area
The opposite side in 223 places side carries out heat-sealing seal, makes the open at one end of packaging film bag 2, and opening forms liquid injection port.
In other embodiments, the airbag area side opposite with side where body region can also be carried out to seal and will be led
The body area side opposite with side where airbag area carries out seal, and the side for keeping body region opposite with side where tab area is as fluid injection
Mouth is reserved, as long as the packaging film bag 2 after battery core can be made to encapsulate remains for the opening of liquid injection port in advance.
Step S4: baking.
Packaging electric core 1 is subjected to vacuum bakeout, the step is identical as the baking procedure in conventional battery preparation method, this
Embodiment is no longer repeated.
Step S5: fluid injection.
Electrolyte is injected from liquid injection port, forms battery semi-finished product, and it is static to carry out high temperature.
Step S6: heat-sealing sealing: heat-sealing seal processing is carried out to liquid injection port, makes four sides in the packaging bag area of packaging film bag 2
Soaking is sealed.
Step S7: chemical conversion.
Battery semi-finished product are subjected to negative pressure chemical conversion, and high temperature is static.The step and phase the step of conventional batteries preparation method
Together, the present embodiment is no longer repeated.
Step S8: tab is cut.
Positive pole ear area 213 and negative lug area 223 are cut, the positive pole ear of size needed for obtaining and cathode pole
Ear.The step is optional step, can cut, can not also be cut to tab area to tab area, should be according to reality
Border situation is selected.
Step S9: finishing molding.
Battery semi-finished product are vacuumized, concora crush and weldering seal the processing such as nail, and make cathode metal film 21 and cathode gold
Belong to film 22 after the intersection of body region and airbag area carries out heat-sealing seal, airbag area is cut, obtains finished battery, add
The battery that work is formed is as shown in Figure 6.
Step S10: detection.
The detections such as capacity check, high-voltage performance test are carried out to product battery.The step of step and customary preparation methods
Identical, the present embodiment is no longer repeated.
Battery preparation method provided in this embodiment can reduce electricity by using 1 winding method of battery core that half-turn folds
The number of plies of 1 floating coat of core and the number of plies of diaphragm 13 are conducive to the ultra-thin words hair of battery to effectively reduce the thickness of battery
Exhibition；Film bag is formed to folded by setting cathode metal film 21 and cathode metallic film 22, in cathode metal film 21 and cathode metallic film
Positive pole ear portion 215 and negative lug portion 225 are respectively set on 22, cathode metal film 21 and cathode metallic film 22 itself can be made
Respectively as a part of anode pole piece 11 and cathode pole piece 12, avoid on plus plate current-collecting body 111 and negative current collector 121
Additional setting positive pole ear and negative lug, simplify the production technology of battery, simultaneously because tab from battery core 1 without stretching
Out, the integral thickness of battery is reduced；Furthermore by using CPP resin glue to cathode metal film 21 and cathode metallic film 22 into
Row heat-seal process avoids the safety and reliability that battery is improved using gel packaging film band and battery core 1, can be effective
Situations such as preventing battery from generating electric leakage, short circuit or corrosion leakage liquid, meanwhile, avoid the sealing of tab caused by sealing using gel
Locate the problem of thickness increases, further reduces the integral thickness of battery.
The present embodiment additionally provides a kind of battery, is formed using above-mentioned battery preparation technique.
Embodiment two
Fig. 7 is the flow chart of battery preparation method provided in an embodiment of the present invention, as shown in fig. 7, present embodiments providing
A kind of battery preparation method, compared with embodiment one, preparation method that the present embodiment two provides except in step S1 anode pole piece with
The molding mode of battery core is different outer in the molding mode and step S2 of cathode pole piece, other steps are each with embodiment one kind
Step is identical, and the present embodiment is no longer repeated the step of being the same as example 1.
Fig. 8 is the structural schematic diagram of battery core provided in this embodiment, as shown in figure 8, battery core provided in this embodiment is by just
Pole pole piece, cathode pole piece and partition are laminated to be formed.The forming process of anode pole piece, cathode pole piece and battery core is as follows.
Step S1: anode pole piece 11 and cathode pole piece 12 are formed.
It includes the following steps:
Step S11: the first anode dressing layer 112 is laid in the one side of plus plate current-collecting body 111 and forms positive coiled strip, in cathode
The 122 cathode coating of the first cathode dressing layer that covers on one side of collector 121 forms cathode coiled strip；
Step S12: cut-parts are carried out to positive coiled strip and cathode coiled strip, anode pole piece 11 and cathode pole piece 12 is made；
Step S12: lamination forms battery core 1:
The stacking of anode pole piece 11, diaphragm 13 and cathode pole piece 12 is formed into battery core 1, wherein 112 He of the first anode dressing layer
First cathode dressing layer 122 is located at the two sides of diaphragm 13, and plus plate current-collecting body 111 and negative current collector 121 are respectively positioned on respectively
The outside of battery core 1.
After the completion of lamination, fixed to fix glue 3, fixed glue 3 is located at battery core upper and lower ends, fixes glue 3 for positive main pole piece
11 and cathode main pole piece 12 be fixed together, be made battery core 1.
Fig. 8 is the structural schematic diagram of battery core 1 provided in this embodiment, and the battery core 1 of formation only has two sides dressing, thickness compared with
It is thin, be conducive to the application of slimline battery.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of battery core film bag packaging method, which comprises the steps of:
Prepare two metal films, and one in two metal films is positive metal film (21), another is negative metal
Film (22), the metal film include the insulating protective layer being cascading, metal material layer and insulation hot sealing layer；
The conductive part of the metal material layer is exposed in setting on the insulation hot sealing layer of the metal film, in the insulation of the metal film
The tab portion for exposing the metal material layer is set on hot sealing layer or on the insulating protective layer；
At least side of two metal films is sealed to form packaging film bag (2)；
The battery core (1) of no tab is placed in the packaging film bag (2), and makes the conduction of the cathode metal film (21)
The metal material layer at portion is contacted with the plus plate current-collecting body (111) of the battery core (1), the cathode metallic film (22) it is described
The metal material layer at conductive part is contacted with negative current collector (121)；
Seal the unclosed side of the packaging film bag and reserved liquid injection port.
2. battery core film bag packaging method according to claim 1, which is characterized in that the tab portion is arranged in the insulation
On hot sealing layer, and the tab portion is located at the outside of the battery core (1) after encapsulation, and the cathode metal film (21) after encapsulation
The tab portion and the cathode metallic film (22) the tab portion misplace.
3. battery core film bag packaging method according to claim 1, which is characterized in that the tab portion is arranged in the insulation
On protective layer.
4. battery core film bag packaging method according to claim 2 or 3, which is characterized in that the metal film includes adjacent sets
The body region and airbag area set, the conductive part setting are greater than the battery core in the body region, the area of the body region
The area of side.
5. a kind of battery preparation method, which is characterized in that use battery core film bag encapsulation side according to any one of claims 1-4
Method carries out the film bag encapsulation of battery core 1.
6. battery preparation method according to claim 5, which is characterized in that before battery core film bag encapsulation, also wrap
It includes to form anode pole piece (11) and cathode pole piece (12), the formation anode pole piece (11) and cathode pole piece (12) include following step
It is rapid:
Positive electrode coating is laid on the two sides of the plus plate current-collecting body (111), the anode pole piece (11) is made to form tool two sides dressing
The first positive section and the second positive section with a face dressing；
Cathode coating is laid on the two sides of the negative current collector (121), the cathode pole piece (12) is formed and is applied with two sides
The the first cathode section expected and the second cathode section with a face dressing.
7. battery preparation method according to claim 6, which is characterized in that the two sides of the plus plate current-collecting body (111) is applied
Material respectively the first anode dressing layer (112) and the second anode dressing layer (113), the first anode dressing layer (112) and institute
One end alignment of the second anode dressing layer (113) is stated, and the length of the first anode dressing layer (112) is being greater than described second just
The length of pole dressing layer (113)；
The two sides dressing of the negative current collector (121) is respectively the first cathode dressing layer (122) and the second cathode dressing layer
(123), the first cathode dressing layer (122) is aligned with one end of the second cathode dressing layer (123), and described first negative
The length of pole dressing layer (122) is greater than the length of the second cathode dressing layer (123).
8. battery preparation method according to claim 6, which is characterized in that the two of the first cathode dressing layer (122)
End is aligned with the both ends of the negative current collector (121), one end of the first anode dressing layer (112) and the anode collection
One end of body (111) is aligned, and the other end of the first anode dressing layer (112) is another with the plus plate current-collecting body (111)
End is at a distance of pre-determined distance.
9. battery preparation method according to claim 7, which is characterized in that in the formation anode pole piece (11) and cathode
It further include that winding forms battery core, the winding forms battery core (1) packet after pole piece (12) and before battery core film bag encapsulation
Include following steps:
Cathode pole piece (12), diaphragm (13) and anode pole piece (11) are sequentially overlapped placement from bottom to up, make second cathode
Section and the described first positive section are staggered relatively, and the first cathode section and the second positive section are located at first anode
The two sides of section, the first cathode dressing layer (122) and the second anode dressing layer (113) are located at the two sides of diaphragm (13), and institute
State the upside that the first cathode dressing layer (122) is located at the negative current collector (121)；
First cathode section bending is superimposed to the top of the described first positive section；
The diaphragm (13) bending positioned at described first cathode section one end is set to coat the first cathode dressing layer (122) and make
One end of the diaphragm (13) extends to the lower section of the second cathode section；
Described second positive section and the diaphragm (13) positioned at described second positive section one end are bent to first cathode
The top of dressing layer (122).
10. a kind of battery, which is characterized in that be made of battery preparation method as claim in any one of claims 6-9.
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| CN201811093797.9A CN109273776B (en) | 2018-09-19 | 2018-09-19 | Battery cell film bag packaging method, battery preparation method and battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697199A (en) * | 2019-03-12 | 2020-09-22 | 宁德新能源科技有限公司 | Pole piece and electrode assembly using same |
| WO2021109315A1 (en) * | 2019-12-06 | 2021-06-10 | 新余赣锋电子有限公司 | Butterfly bean button-type soft package battery cell |
| WO2021135165A1 (en) * | 2019-12-30 | 2021-07-08 | 广东微电新能源有限公司 | Energy storage device and method for assembling energy storage device |
| CN114374032A (en) * | 2020-12-30 | 2022-04-19 | 北京卫蓝新能源科技有限公司 | Tab-free lithium battery core, tab-free lithium battery core module and electric automobile |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7241535B2 (en) * | 2001-10-15 | 2007-07-10 | Samsung Sdi Co., Ltd. | Electrolyte for lithium-sulfur batteries and lithium-sulfur batteries comprising the same |
| JP2012248282A (en) * | 2011-05-25 | 2012-12-13 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| CN104377361A (en) * | 2014-10-20 | 2015-02-25 | 惠州亿纬锂能股份有限公司 | Thin diaphragm battery and preparing method thereof |
| US20150340732A1 (en) * | 2014-05-21 | 2015-11-26 | Samsung Sdi Co., Ltd. | Electrode structure and lithium battery including the same |
| EP2973835A1 (en) * | 2013-03-14 | 2016-01-20 | Sion Power Corporation | Electrochemical cell having a folded electrode and separator, battery including the same, and method of forming same |
| CN106207087A (en) * | 2016-08-25 | 2016-12-07 | 南京安普瑞斯有限公司 | A kind of lithium ion battery and preparation method thereof |
| CN106848325A (en) * | 2017-02-15 | 2017-06-13 | 宁德时代新能源科技股份有限公司 | Secondary battery pole piece, preparation method thereof and winding type battery cell |
| CN108140760A (en) * | 2015-10-02 | 2018-06-08 | 昭和电工包装株式会社 | Electric energy storage device |
-
2018
- 2018-09-19 CN CN201811093797.9A patent/CN109273776B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7241535B2 (en) * | 2001-10-15 | 2007-07-10 | Samsung Sdi Co., Ltd. | Electrolyte for lithium-sulfur batteries and lithium-sulfur batteries comprising the same |
| JP2012248282A (en) * | 2011-05-25 | 2012-12-13 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| EP2973835A1 (en) * | 2013-03-14 | 2016-01-20 | Sion Power Corporation | Electrochemical cell having a folded electrode and separator, battery including the same, and method of forming same |
| US20150340732A1 (en) * | 2014-05-21 | 2015-11-26 | Samsung Sdi Co., Ltd. | Electrode structure and lithium battery including the same |
| CN104377361A (en) * | 2014-10-20 | 2015-02-25 | 惠州亿纬锂能股份有限公司 | Thin diaphragm battery and preparing method thereof |
| CN108140760A (en) * | 2015-10-02 | 2018-06-08 | 昭和电工包装株式会社 | Electric energy storage device |
| CN106207087A (en) * | 2016-08-25 | 2016-12-07 | 南京安普瑞斯有限公司 | A kind of lithium ion battery and preparation method thereof |
| CN106848325A (en) * | 2017-02-15 | 2017-06-13 | 宁德时代新能源科技股份有限公司 | Secondary battery pole piece, preparation method thereof and winding type battery cell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697199A (en) * | 2019-03-12 | 2020-09-22 | 宁德新能源科技有限公司 | Pole piece and electrode assembly using same |
| WO2021109315A1 (en) * | 2019-12-06 | 2021-06-10 | 新余赣锋电子有限公司 | Butterfly bean button-type soft package battery cell |
| WO2021135165A1 (en) * | 2019-12-30 | 2021-07-08 | 广东微电新能源有限公司 | Energy storage device and method for assembling energy storage device |
| CN114374032A (en) * | 2020-12-30 | 2022-04-19 | 北京卫蓝新能源科技有限公司 | Tab-free lithium battery core, tab-free lithium battery core module and electric automobile |
| CN114374032B (en) * | 2020-12-30 | 2023-12-26 | 北京卫蓝新能源科技有限公司 | Electrodeless ear lithium battery core, electrodeless ear lithium battery core module and electric automobile |
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|---|---|
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