CN108417886A - Battery core and its manufacturing method, battery - Google Patents
Battery core and its manufacturing method, battery Download PDFInfo
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- CN108417886A CN108417886A CN201810185137.7A CN201810185137A CN108417886A CN 108417886 A CN108417886 A CN 108417886A CN 201810185137 A CN201810185137 A CN 201810185137A CN 108417886 A CN108417886 A CN 108417886A
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- active material
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
This application discloses battery core and its manufacturing method, batteries.Battery core includes positive plate and negative plate, and positive plate includes that positive plate base negative plate includes cathode plate base, and wherein battery core manufacturing method includes：Positive plate base and cathode plate base are provided；The first positive electrode active material layer is set on the surface of positive plate base, the first negative electrode active material layer is set on the surface of cathode plate base；In positive plate base and cathode plate base, corresponding second active material layer is arranged in the fringe region of at least one, wherein the stickiness of the second active material layer is more than corresponding first active material layer.By increasing the stickiness of positive plate and/or negative plate fringe region active material, so as to improve positive plate and/or negative plate edge active material occurs and falls off and cause positive plate and negative plate that the problem of short circuit occurs.
Description
Technical field
This application involves battery manufacturing fields, more particularly to battery core and its manufacturing method, battery.
Background technology
Continuous with mobile electronic products such as mobile phones is popularized, and mobile electronic product usually can all be set using internal battery
Meter.Wherein battery generally all has battery core, and positive plate, negative plate and diaphragm, positive plate, cathode have been generally comprised in battery core
Piece surface is both provided with corresponding active material layer.However during manufacturing battery core, the work of positive plate and negative plate edge
Property material layer be susceptible to active material and fall off, to cause that the problem of short circuit occurs between positive plate and negative plate.
Invention content
The application provides battery core and its manufacturing method, battery, to solve the positive plate and negative plate of battery core in the prior art
The active material layer at edge be susceptible to fall off and caused by short circuit problem occurs between positive plate and negative plate.
In order to solve the above technical problems, the technical solution that the application uses is：A kind of manufacture of battery battery core is provided
Method, battery core include positive plate and negative plate, and positive plate includes that positive plate base negative plate includes cathode plate base, wherein battery core
Manufacturing method includes：Positive plate base and cathode plate base are provided；On the surface of positive plate base, the first positive-active is set
The first negative electrode active material layer is arranged on the surface of cathode plate base in material layer；Positive plate base and cathode plate base at least
Corresponding second active material layer is arranged in the fringe region of one, wherein the stickiness of the second active material layer is more than corresponding first
Active material layer.
In order to solve the above technical problems, the technical solution that the application uses is：The system of another battery battery core is provided
Method is made, battery core includes positive plate and negative plate, and positive plate includes that positive plate base negative plate includes cathode plate base, wherein electricity
Core, manufacturing method includes：Positive plate base and cathode plate base are provided；Positive plate base and cathode plate base at least one
Corresponding second active material layer is arranged in fringe region, the intermediate region setting on the substrate that the second active material layer is not arranged
Corresponding first active material layer, wherein the stickiness of the second active material layer is more than the first active material layer.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of battery core is provided, battery core is used for
In battery, battery core includes positive plate and negative plate, and positive plate includes positive plate base, and negative plate includes cathode plate base, anode
Plate base and negative plate substrate surface are respectively arranged with corresponding first active material layer；Wherein, positive plate base and negative plate
The substrate fringe region of at least one is provided with corresponding second active material layer, wherein the stickiness of the second active material layer is big
In the first active material layer.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of battery, wherein battery are provided
Including any one of them battery core above.
The advantageous effect of the application is：The case where being different from the prior art, the application provide battery core and its manufacturing method, electricity
Pond.By increasing the stickiness of positive plate and/or negative plate fringe region active material, so as to improve positive plate and/or cathode
Piece edge occur active material fall off and caused by positive plate and negative plate the problem of short circuit occurs.
Description of the drawings
Fig. 1 is a kind of flow diagram of one embodiment of battery battery core manufacturing method of the application；
Fig. 2 is a kind of flow diagram of another embodiment of battery battery core manufacturing method of the application；
Fig. 3 is a kind of structural schematic diagram of one embodiment of battery core provided by the present application；
Fig. 4 is sectional view of the battery core shown in Fig. 3 in the section that A-A ' is；
Fig. 5 is the structural schematic diagram of a battery unit in Fig. 4；
Fig. 6 is the structural schematic diagram of one embodiment of positive plate in the battery unit that Fig. 5 is provided；
Fig. 7 is the structural schematic diagram of another embodiment of positive plate in the battery unit that Fig. 5 is provided；
Fig. 8 is the structural schematic diagram of the another embodiment of positive plate in the battery unit that Fig. 5 is provided；
Fig. 9 is a kind of structural schematic diagram of one embodiment of electronic cell provided by the present application.
Specific implementation mode
Referring to Fig. 1, Fig. 1 is a kind of flow diagram of one embodiment of battery battery core manufacturing method provided by the present application.
Wherein battery core includes positive plate and negative plate, and positive plate includes positive plate base, and negative plate includes cathode plate base.Battery electricity
The manufacturing method step specific as follows of core：
S101：Positive plate base and cathode plate base are provided.
In this step, positive plate base is generally aluminium foil, and cathode plate base is generally copper foil.There is provided positive plate base with
And mainly preset size is made in positive plate base and cathode plate base by cathode plate base.Positive plate base and negative plate
The manufacturing method of substrate is identical, by taking the positive plate base of manufacture as an example, provide positive plate base the specific steps are：Aluminium block is made
Aluminium foil, and aluminium foil is cut into preset size to form positive plate base.So that aluminium block is become aluminium foil and relies primarily on rolling
Power roll forming, that is, adjusting roll gap makes roll gap keep certain value so that aluminium block is rolled into the aluminium foil of consistency of thickness.
S102：The first positive electrode active material layer is set on the surface of positive plate base, is arranged first on the surface of negative plate
Negative electrode active material layer.
After completing step S101 and positive plate base and cathode plate base are provided, continue step S102.Specifically,
The first positive active material and the first negative electrode active material is respectively set on the surface of positive plate base and cathode plate base.Its
In the first positive active material may include metallic compound containing lithium or can embedding lithium metallic compound, as lithium and cobalt oxides,
Lithium manganese oxide, Li, Ni, Mn oxide, lithium-nickel-manganese-cobalt oxide, lithium iron phosphate, lithium manganese phosphate, carbon black or polyvinylidene fluoride
Alkene (PVDF) at least one therein.First negative electrode active material may include：Graphite, sodium carboxymethylcellulose (CMC) and
Butadiene-styrene rubber (Styrene-butadiene rubber, SBR) lithium metal can store up lithium metal powder, can store up lithium metal oxide
Or at least one therein such as all kinds of carbon materials.In this step, the first positive electrode active material is set on the surface of positive plate base
The first negative electrode active material layer, the first positive electrode active material layer and the first negative electrode active material is arranged on the surface of negative plate in matter layer
Matter layer is for realizing the charge-exchange between positive plate and negative plate, to realize the charge and discharge of battery core.
S103：In positive plate base and cathode plate base, corresponding second active matter is arranged in the fringe region of at least one
Matter layer, wherein the stickiness of the second active material is more than the first active material layer.
After completing step S102, continue step S103.That is, in the positive chip base provided with the first active material layer
The second active material layer that stickiness is more than the first active material layer is arranged in the fringe region of plate and/or cathode plate base.It is specific next
It says, is then that the second positive electrode active material layer is set in the fringe region of positive plate base, wherein second just for positive plate base
The stickiness of pole active material layer is more than the first positive electrode active material layer；Then it is on the side of cathode plate base for cathode plate base
The second negative electrode active material layer is arranged in edge region, wherein the stickiness of the second negative electrode active material layer is more than the first negative electrode active material
Layer.By the way that the second active material layer of stickiness bigger is arranged in the fringe region of positive plate and/or negative plate, anode can be improved
Adhesion strength of the active material layer of piece and/or negative plate fringe region on corresponding substrate, so as to mitigate or prevent just
There is the problem of active material falls off in pole piece and/or negative plate fringe region.
In this step, can the second positive electrode active material layer only be set to improve just in the fringe region of positive plate base
Can also the second negative electrode active material layer only be arranged to carry in the fringe region of cathode plate base in the adhesion strength of pole piece fringe region
The adhesion strength of high negative plate fringe region；Can also the second positive active material be set in the fringe region of positive plate base simultaneously
The second negative electrode active material layer is arranged in the fringe region of cathode plate base, to improve positive plate and negative plate side simultaneously in layer
The adhesion strength in edge region.The method that corresponding second active material layer is arranged in the fringe region of positive plate and negative plate can phase
Together.
By taking the second active material layer in the setting of positive plate substrate surface as an example, it is second to be arranged on positive plate base
The set-up mode of positive electrode active material layer, the second active material layer in this step can be following each scheme：
1. after the first positive electrode active material layer is arranged in positive plate substrate surface, to the edge of the first positive electrode active material layer
Region carries out strike-through processing, forms the second positive electrode active material layer of stickiness bigger.Specifically, it is by by glue setting to the
The fringe region of one positive electrode active material layer so that glue penetrates into the positive electrode active material of the fringe region of the first positive electrode active material layer
In matter, to form the second positive electrode active material layer that stickiness is more than the first positive electrode active material layer.
2. after the first positive electrode active material layer is arranged in positive plate substrate surface, glue is applied to the first positive active material
The fringe region of layer so that glue covers the surface of the positive active material of the fringe region of the first positive electrode active material layer, to
Form the second positive electrode active material layer that stickiness is more than the first positive electrode active material layer.
3. after the first positive electrode active material layer is arranged in positive plate substrate surface, by the first positive electrode active material layer marginal zone
First positive active material in domain removes, and the second positive electrode active material then is arranged in the region for removing the first positive active material again
Matter, to form the second positive electrode active material layer.The wherein material of the second positive active material and the first positive active material can be with
It is identical, difference lies in the ratio shared by the sticker in the second positive active material is higher, by adjusting the first positive-active
The ratio of sticker in substance can obtain the second positive active material so that the stickiness of the second positive active material is higher than the
One positive active material.
Since battery core further includes diaphragm, in the battery core manufacturing method described in the present embodiment, the manufacturer of battery core
Method further includes providing diaphragm.
In the present embodiment in the battery core battery core manufacturing method, it need to be also respectively set just on positive plate and negative plate
Pole lug and negative lug.Positive pole ear is set on positive plate, negative lug is set on negative plate.Wherein in positive plate
The method of upper setting positive pole ear can be identical with the method that negative lug is arranged on negative plate, to be arranged just on positive plate
For the method for pole lug.The method of setting positive pole ear includes on positive plate：It, will be positive when to positive plate substrate cut
Plate base cuts into the sheet material with projection portion, and wherein projection portion can be used as positive pole ear, i.e. positive pole ear can be with
Positive plate base is wholely set；Or manufactured positive pole ear is welded on the predeterminated position of positive plate so that positive pole
Ear is electrically connected with the first positive electrode active material layer realization on positive plate.
The manufacturing method of the above battery core is the manufacturing method of positive plate, negative plate and diaphragm.Complete positive plate with
And after negative plate manufactures and provides diaphragm, it is also necessary to diaphragm is arranged between positive plate and negative plate, pass through heap successively
Folded setting positive plate, diaphragm and negative plate, the positive plate for being then provided with stacking, diaphragm and negative plate are wound
Molding, forms the core of battery core；Or by positive plate, diaphragm and negative plate according to positive plate, diaphragm, negative plate, every
Diaphragm, positive plate ... .. sequence stack to form the required structure of battery core.
By diaphragm setting to also need after between positive plate and negative plate to positive plate, negative plate and diaphragm into
Row encapsulation, that is, diaphragm is arranged to after between positive plate and negative plate, to obtained positive plate, diaphragm and negative
The assembly of pole piece is packaged.Its encapsulate specific method be to provide the shell with idle space, then by positive plate, every
In diaphragm and negative plate setting to accommodating space, then the accommodating space of shell is sealed, thus by positive plate, diaphragm
Piece and negative plate are sealed in the interior space of shell.
Wherein, before being sealed to accommodating space, it is also necessary to inject electrolyte into accommodating space so that electrolyte
Submerge positive plate, diaphragm and negative plate.Positive plate and negative plate are carried out charge by electrolyte and are transmitted, so as to realize
Entire battery core being capable of charge and discharge.
Referring to Fig. 2, Fig. 2 is a kind of flow signal of another embodiment of battery battery core manufacturing method provided by the present application
Figure.Wherein battery core equally includes positive plate and negative plate, and positive plate includes positive plate base, and negative plate includes cathode plate base.
Battery core manufacturing method is as follows：
S201：Positive plate base and cathode plate base are provided.
The method of the positive plate base of offer and cathode plate base in this step is identical with step S101 above, herein not
It repeats.
S202：In positive plate base and cathode plate base, corresponding second active material is arranged in the fringe region of at least one
Layer, corresponding first active material layer is arranged in the intermediate region on the substrate that the second active material layer is not arranged, wherein second
The stickiness of active material layer is more than the first active material layer.
The first active material layer is identical as embodiment above in this step, and difference lies in the first active matters of two embodiments
The setting method of matter layer and the second active material layer on substrate is different.
Specifically, in the present embodiment, the setting method of the first active material layer and the second active material layer on substrate exists
Setting method on positive plate base and cathode plate base can be identical, the first positive electrode active material to be arranged on positive plate base
For matter layer and the second positive electrode active material layer, the setting method of positive electrode active material layer includes in this step：There is provided first just
Pole active material and the second positive active material, wherein the material phase of the second positive active material and the first positive active material
Together, difference lies in the ratio shared by the sticker in the second positive active material is higher, by adjusting the first positive electrode active material
The ratio of sticker in matter can obtain the second positive active material so that the stickiness of the second positive active material is higher than first
Positive active material；Then the fringe region to positive plate base is arranged to form the second anode in the second positive active material
Active material layer；The first positive active material is arranged in intermediate region on the positive plate base of the second active material layer is not arranged
Layer, to form the first positive electrode active material layer.
In the present embodiment, the manufacturing method of battery core equally includes manufacture diaphragm, the manufacturing method of diaphragm and institute above
It is identical to state manufacturing method.The set-up mode of same positive plate, negative plate and diaphragm, including on positive plate and negative plate
Be respectively set corresponding lug, positive plate, the setting structure of negative plate and diaphragm and positive plate, negative plate and every
Diaphragm is encapsulated in packaged type in the shell of battery core etc. all can be identical as previously described method, and this will not be repeated here.
Present invention also provides a kind of battery cores.Fig. 3 to Fig. 5 is please referred to, Fig. 3 is that a kind of battery core one provided by the present application is implemented
The structural schematic diagram of example, Fig. 4 is sectional view of the battery core shown in Fig. 3 in the section of A-A ', and Fig. 5 is a battery unit in Fig. 4
Structural schematic diagram.Battery core 400 includes positive plate 410 and negative plate 420.Positive plate 410 includes positive plate base, negative plate
420 include cathode plate base, and positive plate base and negative plate substrate surface are respectively arranged with corresponding first active material layer, institute
It states positive plate base and the cathode plate base fringe region of at least one is provided with corresponding second active material layer,
In, the stickiness of the second active material layer is more than the first active material layer.Optionally, the second positive electrode active material layer 411 is by right
The fringe region of the first active material layer on corresponding substrate carries out strike-through processing and is formed；Or by the way that glue is covered in corresponding base
The surface of the fringe region of first active material layer on plate is formed；Or second active material layer sticker ratio
Higher than the ratio of the sticker with first positive electrode active material layer.
By taking positive plate 410 as an example, the edge of positive plate 410 is provided with the second positive electrode active material layer 411, and be not arranged
The intermediate region of two positive electrode active material layers 411 is provided with the first positive electrode active material layer 412, wherein the second positive active material
The stickiness of layer 411 is more than the stickiness of the first positive electrode active material layer 412.
Wherein, set-up mode of second positive electrode active material layer 411 on positive plate base 416 includes following scheme.
Fig. 5 and Fig. 6 are please referred to, Fig. 6 is the structural schematic diagram of one embodiment of positive plate in the battery unit that Fig. 5 is provided.Its
In, the surface of the positive plate base 416 of positive plate 410 is provided with the first positive electrode active material layer 412 and the second positive-active
Material layer 411, wherein the second positive electrode active material layer 411 is set to the fringe region of positive plate base 416, and the second anode
The annular region that active material layer 411 forms a sealing surrounds the first positive electrode active material layer 412.
Fig. 5 and Fig. 7 are please referred to, Fig. 7 is the structural schematic diagram of another embodiment of positive plate in the battery unit that Fig. 5 is provided.
Wherein positive plate 410 equally includes positive plate base 416, and the surface of positive plate base 416 is again provided with the first positive-active
Material layer 412 and the second positive electrode active material layer 411.Difference lies in the second positive electrode active materials with the positive plate described in Fig. 6
The subregion at the edge of positive plate base 416 is arranged in matter layer 412, and the second positive electrode active material layer 412 is positive by first
411 part of active material layer surrounds, i.e. the second positive electrode active material layer 412 is not the loop configuration to be closed, such as in this reality
It applies in example, the corresponding fringe region in 3 sides in positive plate 410 can be arranged in the second positive electrode active material layer 412.
Fig. 5 and Fig. 8 are please referred to, Fig. 8 is the structural schematic diagram of the another embodiment of positive plate in the battery unit that Fig. 5 is provided.
Wherein positive plate 410 equally includes positive plate base 416, and the surface of positive plate base 416 is again provided with the first positive-active
Material layer 412 and the second positive electrode active material layer 411.Difference lies in the second positive electrode active materials with the positive plate described in Fig. 6
The fringe region on the both sides of positive plate base 416 is arranged in matter layer 412.
Therefore, the application at the edge of positive plate 410 and/or negative plate 420 by being arranged the larger active material of stickiness
Layer, can play solidification to the edge of positive plate 410 and/or negative plate 420, can prevent positive plate and/or negative plate
There is the problem of active material is fallen.
It is understood that in other embodiments, second positive electrode active material layer can be only arranged at positive chip base
On the part edge region of plate 416, it is such as set to quadrangle, or be arranged at intervals on fringe region.
In the present embodiment, the second positive electrode active material layer 411 and the first positive-active can be set on positive plate 410
Material layer 412, the stickiness of the second positive electrode active material layer 411 is more than the stickiness of the first positive electrode active material layer 412, i.e., to anode
Piece 410 carries out curing process.Likewise, curing process can also be carried out to negative plate 420 or to positive plate 410 and cathode
Piece 420 all carries out curing process, to the edge of negative plate carry out the method for curing process with to positive plate solidification processing method phase
Together, this will not be repeated here.
In other embodiments, chip 400 can also include diaphragm 430, and wherein diaphragm 430 is arranged in positive plate
Between 410 and negative plate 420, for separating positive plate 410 and negative plate 420.Positive pole is also provided on positive plate 410
Ear 414 can also equally be provided with negative lug 424 on negative plate 420, and wherein positive pole ear 414 connects with positive plate base 416
It connects, negative lug 424 is electrically connected with cathode plate base 426.Positive pole ear 414 and negative lug 424 correspond to battery core 400 respectively
Positive and negative anodes, that is, battery core 400 completes charge and discharge process by positive pole ear 414 and negative lug 424.
Further, battery core 400 can also include shell 440, shell 440 be provided with accommodating space 441 for be arranged just
Pole piece 410, negative plate 420 and diaphragm 430.When positive plate 410, negative plate 420 and diaphragm 430 setting to accommodating sky
Between in 441 after, it is also necessary to inject electrolyte into accommodating space 441 so that positive plate 410, negative plate 420 and diaphragm
430 impregnate in the electrolytic solution, and the effect of electrolyte is so that positive plate 410 and negative plate 420 are carried out charge by electrolyte and passed
It is defeated, so as to realize that entire battery core 400 being capable of charge and discharge.Wherein electrolyte is generally by the organic solvent of high-purity, electrolyte
The raw materials such as lithium salts (lithium hexafluoro phosphate) are formulated by a certain percentage under certain condition.
In the present embodiment, battery core 400 include positive plate 410, negative plate 420 and diaphragm 430, wherein positive plate 410,
Negative plate 420 and diaphragm 430 can be arranged with takeup type can also stack setting.When positive plate 410, negative plate 420 with
And when the setting of 430 takeup type of diaphragm, positive plate 410, diaphragm 430 and negative plate 420 are sequentially overlapped setting, then pass through
The core of battery core 400 is formed after winding；When positive plate 410, negative plate 420 and 430 stack of diaphragm are arranged, positive plate
410, negative plate 420 and diaphragm 430 can be according to positive plate 410, diaphragm 430, negative plate 420, diaphragms 430, just
The sequence of pole piece 410. ... .. stacks, i.e., adjacent positive plate 410 and negative plate 420 are separated by diaphragm 430, by will just
Pole piece 410, negative plate 420 and diaphragm 430 stack setting and arrive required size, to form the required electrode slice of battery core
Component.
It is understood that the battery core 400 described in the various embodiments described above can be made by the production method of battery core described previously.
The present embodiment additionally provides a kind of battery, referring to Fig. 9, Fig. 9 is one embodiment of a kind of battery provided by the present application
Structural schematic diagram.Wherein battery 500 includes battery core 510, and battery core 510 is not done herein such as any one of them battery core above
It repeats.
Therefore, the present embodiment proposes battery core and its manufacturing method, battery.By battery core positive plate base and/or
The fringe region setting stickiness of negative plate substrate surface is more than the second active material layer of the first active material layer, then in anode
The first active material layer is arranged in the region that the second active material layer is not arranged for plate base and/or cathode plate base, therefore can make
The fringe region of positive plate and/or negative plate active material it is fixed more securely, so as to prevent positive plate and/or
The problem of active material of cathode fringe region falls off, so as to improve the activity because of positive plate and/or cathode edge
There is the problem of short circuit in positive plate and negative plate caused by substance falls off.
Above is only an example of the present application, it is not intended to limit the scope of the claims of the application, it is every to utilize this Shen
Please equivalent structure or equivalent flow shift made by specification and accompanying drawing content, be applied directly or indirectly in other relevant skills
Art field includes similarly in the scope of patent protection of the application.
Claims (10)
1. a kind of battery core manufacturing method, the battery core includes positive plate, negative plate, and the positive plate includes positive plate base, institute
It includes cathode plate base to state negative plate.It is characterized in that, the battery core manufacturing method includes：
The positive plate base and the cathode plate base are provided；
The first positive electrode active material layer is set on the surface of the positive plate base, the setting the on the surface of the cathode plate base
One negative electrode active material layer；
In the positive plate base and the cathode plate base fringe region of at least one, corresponding second active material is set
Layer, wherein the stickiness of second active material layer is more than corresponding first active material layer.
2. battery core manufacturing method according to claim 1, which is characterized in that
The first positive electrode active material layer is set on the surface of the positive plate base, the setting the on the surface of the cathode plate base
One negative electrode active material layer is specially：
The first positive active material and first negative is respectively set on the surface of the positive plate base and the cathode plate base
Pole active material, wherein first positive active material includes lithium and cobalt oxides, lithium manganese oxide, Li, Ni, Mn oxide, lithium
Ni-Mn-Co-O compound, lithium iron phosphate, lithium manganese phosphate, carbon black or Kynoar (PVDF) at least one therein, institute
It includes graphite, sodium carboxymethylcellulose (CMC) and butadiene-styrene rubber (Styrene-butadiene to state the first negative electrode active material
Rubber, SBR) lithium metal, lithium metal powder can be stored up, lithium metal oxide can be stored up or carbon material at least one therein.
3. battery core manufacturing method according to claim 2, which is characterized in that
It is described in the positive plate base and the cathode plate base corresponding second activity of fringe region setting of at least one
Material layer specific steps include：
Strike-through processing is carried out to the fringe region of corresponding first active material layer to form corresponding second activity
Material layer；Or
Glue is covered in the surface of the fringe region of first active material layer to form corresponding second active material
Layer.
4. battery core manufacturing method according to claim 2, which is characterized in that
It is described in the positive plate base and the cathode plate base corresponding second activity of fringe region setting of at least one
Material layer specific steps include：
First active material of the first active material layer fringe region is removed, first active material is being removed
Region corresponding second active material is set, to form corresponding second active material layer, wherein second activity
Ratio of the ratio of the sticker of substance higher than the sticker of first active material.
5. a kind of battery core manufacturing method, the battery core includes positive plate, negative plate, and the positive plate includes positive plate base, institute
It includes cathode plate base to state negative plate.It is characterized in that, the battery core manufacturing method includes：
The positive plate base and the cathode plate base are provided；
In the positive plate base and the cathode plate base fringe region of at least one, corresponding second active material is set
Corresponding first active material layer is arranged in layer, the intermediate region on the substrate that second active material layer is not arranged, wherein
The stickiness of second active material layer is more than first active material layer.
6. battery core manufacturing method according to claim 5, which is characterized in that
It is specific that corresponding first active material layer is arranged in intermediate region on the substrate that second active material layer is not arranged
For：
The first positive active material and first negative is respectively set on the surface of the positive plate base and the cathode plate base
Pole active material, wherein first positive active material includes lithium and cobalt oxides, lithium manganese oxide, Li, Ni, Mn oxide, lithium
Ni-Mn-Co-O compound, lithium iron phosphate, lithium manganese phosphate, carbon black or Kynoar (PVDF) at least one therein, institute
It includes graphite, sodium carboxymethylcellulose (CMC) and butadiene-styrene rubber (Styrene-butadiene to state the first negative electrode active material
Rubber, SBR) lithium metal, lithium metal powder can be stored up, lithium metal oxide can be stored up or carbon material at least one therein；
Second active material layer is formed by improving the sticker ratio of the first active material.
7. a kind of battery core, the battery core is used in battery, which is characterized in that
The battery core includes positive plate and negative plate, and the positive plate includes positive plate base, and the negative plate includes negative plate
Substrate, the anode plate base and the negative plate substrate surface are respectively arranged with corresponding first active material layer；
Wherein, the positive plate base and the cathode plate base fringe region of at least one are provided with corresponding second activity
Material layer, wherein the stickiness of second active material layer is more than first active material layer.
8. battery core according to claim 7, which is characterized in that
Second active material layer carries out strike-through by the fringe region to first active material layer on corresponding substrate
Processing is formed；Or
Glue by being covered in the fringe region of first active material layer on corresponding substrate by second active material layer
Surface formed.
9. battery core according to claim 7, which is characterized in that
Second active material layer by the way that first active material of the first active material layer fringe region is removed,
Corresponding second active material is set in the region for removing first active material and is formed, wherein second active material
Sticker ratio higher than first active material sticker ratio；Or
The positive plate and/or negative plate in corresponding substrate edge region by being arranged corresponding second active material
Then layer is formed in corresponding first active material layer of position setting that second active material layer is not arranged.
10. a kind of battery, the battery includes battery core, which is characterized in that the battery core includes described in claim any one of 7-9
Battery core；Or include by the battery core manufactured by claim 1-6 any one of them methods.
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Application publication date: 20180817 |