CN108305988A - Button laminated lithium ion battery and the pole piece for being suitble to it to use - Google Patents
Button laminated lithium ion battery and the pole piece for being suitble to it to use Download PDFInfo
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- CN108305988A CN108305988A CN201810048773.5A CN201810048773A CN108305988A CN 108305988 A CN108305988 A CN 108305988A CN 201810048773 A CN201810048773 A CN 201810048773A CN 108305988 A CN108305988 A CN 108305988A
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- collector
- notch
- projecting piece
- pole piece
- positive
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical class [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title abstract description 34
- 239000011247 coating layer Substances 0.000 claims abstract description 23
- 239000011149 active material Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 15
- 229910052744 lithium Inorganic materials 0.000 claims description 15
- 239000007773 negative electrode material Substances 0.000 claims description 8
- 239000007774 positive electrode material Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 31
- 238000010586 diagram Methods 0.000 description 27
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000004806 packaging method and process Methods 0.000 description 7
- 238000003475 lamination Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 239000011888 foil Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 241000773945 Trimusculidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/78—Shapes other than plane or cylindrical, e.g. helical
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to field of lithium ion battery, disclose a kind of button laminated lithium ion battery and the suitable pole piece that it is used.Pole piece includes：The surface shape of collector, the collector is rounded, and the first radially-inwardly recessed notch is respectively arranged on the surface of the collector and radially outward exceeds outwardly directed first projecting piece of circular edge of the collector；The active material coating layer on at least surface coated in the collector, the active material coating layer are covered in all other region of the collection liquid surface in addition to first projecting piece.Using the technical program, be conducive to the capacity and high rate performance that improve battery.
Description
Technical field
The present invention relates to lithium ion battery manufacturing field more particularly to a kind of button laminated lithium ion battery and it is suitble to it
The pole piece used.
Background technology
Lithium-ion button battery is widely used, but mostly uses the lithium ion battery coil core of winding, button cell shell greatly at present
Space be not fully utilized, thus capacity is low, while the battery multiplying power discharging property of winding core is poor, these deficiency limitations
The application of button cell, also cannot increasingly meet the needs of people are to high power capacity and high-multiplying-power battery.
Invention content
The first purpose of the embodiment of the present invention is to provide a kind of button laminated lithium ion battery and the suitable pole that it is used
Piece is conducive to the capacity and high rate performance that improve battery using the technical program.
In a first aspect, a kind of pole piece suitable for fastening lithium ionic cell provided in an embodiment of the present invention, feature
It is, including：
The surface shape of collector, the collector is rounded, and radial direction is respectively arranged on the surface of the collector
The first notch for being inwardly recessed and outwardly directed first projecting piece of circular edge for radially outward exceeding the collector；
The active material coating layer on at least surface coated in the collector, the active material coating layer covering
In all other region of the collection liquid surface in addition to first projecting piece.
Optionally, the second radially-inwardly recessed notch, third are also respectively provided in the both sides of first projecting piece
Notch,
Second notch, third notch respectively in the both sides of first projecting piece, formed first projecting piece with
The gap of the arc edge of the collector.
Optionally, first notch, the first projecting piece are located at two edges facing each other of the collector.
Optionally, the active material coating layer has been respectively coated on two surfaces of the collector.
Optionally, the collector is copper foil, and the active material coating layer is：Positive electrode active materials coating layer.
Optionally, the collector is aluminium foil, and the active material coating layer is：Negative electrode active material coating layer.
Second aspect, a kind of fastening lithium ionic cell provided in an embodiment of the present invention, including above-mentioned any pole
Piece.
Therefore using technical solution of the embodiment of the present invention, since the present embodiment uses Special-shaped lithium ion battery pole
The shape of piece, pole piece can be matched with the arc inner wall of button laminated lithium ion battery, can be bonded its inner wall completely, be made full use of
The intracavity space of button laminated lithium ion battery improves the coated side of the active material of pole piece to the maximum extent, is conducive to carry
The capacity of high button cell；
In addition, being provided with the first projecting piece and the first notch on a current collector, make the first projecting piece as this pole piece
Electrode is electrically connected with the pole piece of the identical polar of other laminations, the first notch as the pole piece opposite with this pole piece first
Projecting piece faces, and the first projecting piece of the pole piece opposite with this pole piece is made mutually to be stretched out from the notch of this pole piece, realizes not homopolarity
Property electrode be staggered, to the maximum extent avoid button cell short circuit.
To sum up, using the present embodiment technical solution, be conducive to the space for the inner cavity for making full use of button cell, be conducive to
The capacity of button cell is improved, and is conducive to avoid battery short circuit, improves the safety of battery.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, not
Constitute inappropriate limitation of the present invention.
Fig. 1 is a kind of main view knot for pole piece suitable for button laminated lithium ion battery that the embodiment of the present invention 1 provides
Structure schematic diagram；
Fig. 2 is the overlooking structure diagram of Fig. 1；
Fig. 3 is the side structure schematic diagram of Fig. 1；
Fig. 4 is the dimensional structure diagram of Fig. 1；
Fig. 5, which is a kind of merging suitable for button laminated lithium ion battery that the embodiment of the present invention 2,3,4 provides, to be had just
The main structure diagram of pole piece diaphragm bag；
Fig. 6 is the overlooking structure diagram of Fig. 4；
Fig. 7 is the side structure schematic diagram of Fig. 4；
Fig. 8 is the dimensional structure diagram of Fig. 4；
Fig. 9 is a kind of main structure diagram for insulating trip that the embodiment of the present invention 2,3,4 provides；
Figure 10 is the overlooking structure diagram of Fig. 9；
Figure 11 is the side structure schematic diagram of Fig. 9；
Figure 12 is the dimensional structure diagram of Fig. 9；
Figure 13 is a kind of main structure diagram for button laminated lithium ion battery that the embodiment of the present invention 2 provides；
Figure 14 is the overlooking structure diagram of Figure 13；
Figure 15 is the side structure schematic diagram of Figure 13；
Figure 16 is the partial enlargement structural representation of the component I in Figure 15；
Figure 17 is the dimensional structure diagram of Figure 13；
Figure 18 is the assembling structure schematic diagram of Figure 13；
Figure 19 is a kind of main structure diagram for button laminated lithium ion battery that the embodiment of the present invention 3 provides；
Figure 20 is the overlooking structure diagram of Figure 19；
Figure 21 is the side structure schematic diagram of Figure 19；
Figure 22 is the partial enlargement structural representation of the component II in Figure 21；
Figure 23 is the partial enlargement structural representation of the component III in Figure 21；
Figure 24 is the dimensional structure diagram of Figure 19；
Figure 25 is the assembling structure schematic diagram of Figure 19；
Figure 26 is a kind of main structure diagram for button laminated lithium ion battery that the embodiment of the present invention 4 provides；
Figure 27 is the overlooking structure diagram of Figure 26；
Figure 28 is the side structure schematic diagram of Figure 26；
Figure 29 is the partial enlargement structural representation of the component I in Figure 28；
Figure 30 is the partial enlargement structural representation of the component II in Figure 28；
Figure 31 is the dimensional structure diagram of Figure 26；
Figure 32 is the assembling structure schematic diagram of Figure 26.
Reference numeral：
100：Collector；101：Active material coating layer；102：First notch；
103：First projecting piece；104：Second notch；105：Third notch；
201：First cathode notch；202：First cathode projecting piece；
203：Second cathode notch；204：Third cathode notch；
301：First positive notch；302：First positive projecting piece；
303：Second positive notch；304：Third anode notch；
400：Outermost layer single side negative plate；
401：The negative current collector surface of outermost layer single side negative plate 400；
500：Diaphragm bag；501：First diaphragm notch；
502：Second diaphragm notch；503：Packaging line；
600：Insulating trip；601：Insulating trip notch；
700：Outermost layer single side positive plate；701：The plus plate current-collecting body surface of outermost layer single side positive plate 700；
800：Diaphragm；
900：Metal foil；901：Projecting piece.
Specific implementation mode
Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, herein schematic implementation of the invention
Example and explanation are used for explaining the present invention, but not as a limitation of the invention.
Embodiment 1
Referring to shown in Fig. 1-4, present embodiments providing a kind of pole piece suitable for button laminated lithium ion battery,
Including：The active material coating layer 101 of collector 100, at least one side coated in collector 100.
Collector 100 is metal foil.
It is general at this time but be not limited to using aluminium foil as collector 100, the activity when current pole piece is positive plate
Material is lithium ion active material；
It is general at this time but be not limited to using copper foil as collector 100, the activity when current pole piece is negative plate
Material is the negative electrode active materials such as graphitic carbon.
The entire surface shape of the collector 100 of the present embodiment is rounded, and radial direction is respectively arranged on collector 100
The notch (under be denoted as the first notch 102) being inwardly recessed and the circular edge radially outward beyond collector 100 and it is outside
The projecting piece (under be denoted as the first projecting piece 103) stretched out.Active material coating layer 101 is uniformly covered with the table in collector 100
Face, all other region in addition to the first projecting piece 103, even if two surfaces of the first projecting piece 103 of collector 100 are not
Coated with active material, and keep its collector 100 exposed outside.
As the signal of the present embodiment, presses above structure when the two sides of the collector 100 in the present embodiment and be coated with work
Property material when, which is double spread pole piece (Fig. 1-4 with double spread be signal)；When only being pressed in the one side of collector 100
When above structure is coated with active material, which is one side coating pole piece.
Therefore using technical solution of the embodiment of the present invention, since the present embodiment uses Special-shaped lithium ion battery pole
The shape of piece, pole piece can be matched with the arc inner wall of button laminated lithium ion battery, can be bonded its inner wall completely, be made full use of
The intracavity space of button laminated lithium ion battery improves the coated side of the active material of pole piece to the maximum extent, is conducive to carry
The capacity of high button cell；
In addition, being provided with the first projecting piece 103 and the first notch 102 on collector 100, make the first projecting piece 103
Electrode as this pole piece is electrically connected with the pole piece of the identical polar of other laminations, the first notch 102 as with this pole piece phase
First projecting piece 103 of anti-pole piece faces, and makes the first projecting piece 103 of the pole piece opposite with this pole piece from this pole piece
Notch mutually stretches out, and realizes being staggered for the electrode of opposed polarity, avoids button cell short circuit to the maximum extent.
To sum up, using the present embodiment technical solution, be conducive to the space for the inner cavity for making full use of button cell, be conducive to
The capacity of button cell is improved, and is conducive to avoid battery short circuit, improves the safety of battery.
It is unrestricted as the signal of the present embodiment, also divide in the both sides of the first projecting piece 103 of the pole piece of the present embodiment
It is not provided with the second radially-inwardly recessed notch 104, third notch 105, the second notch 104, third notch 105 is made to distinguish
Positioned at the both sides of the first projecting piece 103, two notch is as between the first projecting piece 103 and the arc edge of collector 100
Gap, using this be provided with conducive to during lamination pair the first projecting piece 103 and pole piece position, it is ensured that it is stacked on top of one another
Identical first projecting piece, about 103 face of polarity, avoid pole piece from shifting.
It is unrestricted as the signal of the present embodiment, the first notch 102 of pole piece, the first projecting piece 103 can be distinguished
It is arranged at two mutual radial face edges of collector 100, in this way, being laminated obtained by being laminated using the present embodiment structure pole piece
The electrode of body is located at two both sides diametrically of the cylindrical layer stack, keeps the distance between electrode farthest, maximum limit
Electric pole short circuit is avoided to degree, improves the safety of battery.
Embodiment 2：
Apply positive plate, the negative plate of structure described in above-described embodiment 1 that button laminated lithium ion battery is made below：
Referring to shown in Fig. 5-18, the button laminated lithium ion battery of the present embodiment includes mainly：Button shell, the shell
Be made of upper top cover, lower head cover and the dead ring that is spaced between upper top cover, lower head cover, upper upper top cover, lower head cover circle
Be open fastening facing each other, forms shell, is provided in the interior intracavitary of shell：The stacking constituted is laminated by positive plate, negative plate
Body.
The laminated body concrete structure is as follows：
The structure of each negative plate in laminated body is as described in example 1 above, for convenience, will be radial on negative plate
The first notch being inwardly recessed is denoted as：First cathode notch 201 will radially outward exceed the circular edge of negative plate to overhanging
The first projecting piece gone out is denoted as：First cathode projecting piece 202.It is exposed bear on two surfaces of the first cathode projecting piece 202
Pole collector.
In design, so that the width of the first cathode notch 201 is wider than the width of the first positive projecting piece 302, make each anode
First positive projecting piece 302 of piece stretched out from the first cathode notch 201 of negative plate and with 201 both sides of the first cathode notch
It is additionally provided with certain gap, further facilitates the positioning of the first positive projecting piece 302, and is conducive to avoid stretching from the notch
The the first positive projecting piece 302 gone out is in contact with negative plate causes battery short circuit.
The structure of each positive plate in laminated body is as described in example 1 above, for convenience, will be radial on positive plate
The first notch being inwardly recessed is denoted as：First positive notch 301 will radially outward exceed the circular edge of positive plate to overhanging
The first projecting piece gone out is denoted as：First positive projecting piece 302.Two surfaces of the first positive projecting piece 302 be it is exposed just
Pole collector.
In design, so that the width of the first positive notch 301 is wider than the width of the first cathode projecting piece 202, make each cathode
First cathode projecting piece 202 of piece stretched out from the first of positive plate the positive notch 301 and with the first 301 both sides of positive notch
Also gap, further facilitates the positioning of the first cathode projecting piece 202, and it is negative to be conducive to avoid stretching out from the notch first
Pole projecting piece 202 is in contact with positive plate causes battery short circuit.
Above-mentioned positive plate, negative plate are mutually laminated to obtain whole cylinder laminated body, in the laminated body, appointed
It anticipates and has been respectively separated a membrane layer between adjacent negative plate, positive plate：
Face is laminated in each first cathode projecting piece 202, and the first all cathode projecting pieces 202 faces stacking with all
The first positive 301 phase of notch face up and down, and stretch out outside cylinder, will be laminated from the first positive notch 301 of the stacking
The section of stretching out of each first cathode projecting piece 202 to extend welds together jointly, then with the cathode head cover of button cell
Electrical connection forms the cathode of button laminated lithium ion battery.
Face is laminated in each first positive projecting piece 302, and all first positive projecting piece 302 faces stacking with all
201 phase of the first cathode notch up and down face, and from the first cathode notch 201 of the stacking stretch out outside circular edge, by layer
The section of stretching out of folded the first anode projecting piece 302 to extend welds together jointly, is then pushed up again with the anode of button cell
Lid electrical connection, forms the anode of button laminated lithium ion battery.
Therefore it is obtained using the present embodiment technical solution due to using each pole piece shape of the present embodiment for circle
The laminated body arrived is integrally cylinder, and the laminated body is complete with the inner cavity of the shell of button laminated lithium ion battery to the maximum extent
Full matching, makes full use of the space of button laminated lithium ion battery, is conducive to the capacity for improving button cell.
Also, make the first positive projecting piece 302 of all phases stacking respectively with the first cathode notch 201 for being layered on top of each other
Phase face and in the first cathode notch 201 of the stacking up and down, the first positive projecting piece 302 and each first of the stretching
The negative plate edge on the both sides of cathode notch 201 is respectively provided with certain gap, can to avoid the first positive projecting piece 302 with
Negative plate contacts and leads to short circuit；
Similarly, make the first cathode projecting piece 202 of all phases stacking respectively on the first positive notch 301 for being mutually laminated
Lower face and in the first positive notch 301 of the stacking, the first cathode projecting piece 202 of the stretching and each first anode
The positive plate edge on the both sides of notch 301 all has certain gap, and the first cathode projecting piece 202 is avoided to be contacted with positive plate
And lead to short circuit.
To sum up, using the present embodiment technical solution, be conducive to the safety for improving button cell.
Unrestricted as the signal of the present embodiment, the present embodiment can be, but not limited to using diaphragm bag shown in Fig. 5-8
500, using positive plate bag making technique, each positive plate is individually enclosed in a diaphragm bag 500, it is specific as follows：
Each positive plate is respectively implanted in diaphragm bag 500, it is made to be laid in diaphragm bag 500, and diaphragm bag 500 is by upper and lower two
Layer diaphragm face is constituted, and diaphragm bag 500 is identical as the circular profile of positive plate, and interior chamber size is slightly wider than the size of positive plate,
And when the arcuate profile of diaphragm bag 500 is identical as the circle-arc profile of negative plate and size is identical makes it be laminated with negative plate
Levels size is consistent.The first radially-inwardly recessed diaphragm notch 501, the second diaphragm are respectively arranged on diaphragm bag 500
First positive projecting piece 302 of notch 502, positive plate is stretched out from the first diaphragm notch 501 of diaphragm bag 500, and the of positive plate
One positive notch 301 is located at the second diaphragm notch 502 of diaphragm bag 500.
When carrying out lamination, makes merging have each diaphragm bag 500 of positive plate and each negative plate stacked on top of one another one by one, make layer
First cathode projecting piece 202 of folded each negative plate respectively with the second about 502 diaphragm notch of the diaphragm bag of stacking 500 just
It is right, it is stretched out from the second diaphragm notch 502.
It should be noted that the second diaphragm notch 502 design of diaphragm bag 500 belongs to the preferred of the present embodiment rather than must
Selecting technology feature is designed using the second diaphragm notch 502, is not only improved and is reduced diaphragm cost, further facilitates merging
Positioning of the positive plate in diaphragm bag 500, avoids shifting, and in stacking, is being also used as stacking with negative plate just
To anchor point, is conducive to the positioning of each laminates when stacking, avoids laminates from shifting, keep the stacking of laminated body more smooth, carry
High stack efficiency and stacking flatness.
It is unrestricted as the signal of the present embodiment, it is both provided with packaging line in the surrounding of the diaphragm bag 500 of the present embodiment
503.The packaging line 503 can enter have the progress hot pressing of diaphragm bag 500 of positive plate that levels diaphragm is made mutually to heat combination to be opposed
The packaging line 503 formed together；Or there is the progress laser spot welding of diaphragm bag 500 of positive plate to make levels merging
Diaphragm mutually heats the packaging line 503 being combined together to form；The packaging line 503 can be continuous, or discontinuous
, wherein it is preferred that using 503 structure of discontinuous packaging line, electrolyte is further conducive to using the discontinuous encapsulating structure
It immerses, improves fluid injection speed.
It is unrestricted as the signal of the present embodiment, as described in Example 1 similarly, on every positive plate, in the first anode
The both sides of projecting piece 302 are also respectively provided with the second radially-inwardly recessed positive notch 303, third anode notch 304.It should
Second positive notch 303, third anode notch 304 are located at the both sides of the first positive projecting piece 302, form the first anode
The gap of projecting piece 302 and the arc edge of anode.It is designed using the gap, makes the ginseng positioned to each lamination when stacking
Position is examined other than the first positive projecting piece 302, may further also utilize the second positive notch 303, third anode notch
304 carry out positioning alignment, and laminates is avoided to deviate, and improve the flatness of stacking.
Similarly, unrestricted as the signal of the present embodiment, as described in Example 1 similarly, on every negative plate,
The both sides of one cathode projecting piece 202 are also respectively provided with the second radially-inwardly recessed cathode notch 203, third cathode notch
204, the second cathode notch 203, third cathode notch 204 are located at the both sides of the first cathode projecting piece 202, form the
The gap of one cathode projecting piece 202 and the arc edge of cathode.It is designed using the gap, makes to carry out each laminates when stacking
The position of positioning may further also utilize the second cathode notch 203, third cathode other than the first cathode projecting piece 202
Notch 204 is positioned, and laminates is avoided to deviate, and improves the flatness of stacking.
In addition, due to respectively in first 302 (the first cathode projecting piece of positive projecting piece of each positive plate (or negative plate)
202) the second positive notch 303, third anode notch 304 (or the second cathode notch 203, third cathode is respectively set in both sides
Notch 204), make to occur certain offset even if a certain positive plate (or negative plate), the first positive projecting piece 302 (or first
Cathode projecting piece 202) it is not easy to be in contact with the circular arc rim of negative plate (or positive plate), avoid short circuit.
Unrestricted as the signal of the present embodiment, the buckle type lithium-ion laminated batteries of the present embodiment may be used following
Structure：
According to the lamination process of the prior art by positive plate (the wherein positive plate of the active material coat of double spread
Can be, but not limited to be embedded in diaphragm bag 500), negative plate be laminated to form laminated body, make any positive electrode active materials coat
Equal face has a negative electrode active material coat, in negative plate (spy's note of laminated body outermost layer (containing the bottom and top)
For outermost layer single side negative plate 400) when, the negative plate of one side coating is no longer used using the negative plate of double spread at this time,
The positive electrode active materials of the negative electrode active material coating layer positive plate adjacent thereto of the outermost layer single side negative plate 400 are made to apply
Coating faces, and the exposed negative current collector surface 401 of outermost layer single side negative plate 400 is outwardly.
In cathode roof side, make the negative pole currect collecting of cathode head cover and the outermost layer single side negative plate 400 of this cathode roof side
Body surface face 401 contacts face-to-face, is not necessarily to the company that welding realizes the cathode of laminated body cathode and fastening lithium ionic cell at this time
It connects, be conducive to save space and improve process efficiency.
In positive roof side, it is placed in an insulating trip 600, insulating trip 600 is made to be spaced in the outermost layer single side cathode of laminated body
Between the negative current collector surface 401 of piece 400 and positive head cover, then by the welded together on laminated body first anode
Projecting piece 302 is welded on positive head cover, realizes the connection of the anode of laminated body and the anode of fastening lithium ionic cell.
Unrestricted as the signal of the present embodiment, the insulating trip 600 of the present embodiment is preferably but not limited to use Fig. 9-12
Shown structure：
The insulating trip 600 is rounded, be provided on circular edge one and first positive projecting piece 302 match
Radially recessed insulating trip notch 601, and make the width of the insulating trip notch 601 slightly larger than the first positive projecting piece 302
Width makes the welded together on laminated body first positive projecting piece 302 pass through the insulating trip notch 601 and positive head cover
It is welded to connect, insulating trip 600 is included using the insulating gaps conducive to the curved of the first positive projecting piece 302 for avoiding lamellar body
Folding.
Embodiment 3：
Referring to shown in Figure 19-25.
Positive plate in the present embodiment can be, but not limited to similarly use positive plate bag making technique with embodiment 2.
The structure of positive plate, negative plate in the present embodiment can be identical as embodiment 1,2.
2 differences of the button laminated lithium ion battery of the present embodiment and embodiment essentially consist in：
After the negative plate of the positive plate of each double spread, double spread is layered on top of each other according to the prior art：
1, in the outermost layer negative plate 400 for being laminated to cathode roof side, which does not use two-sided
The negative plate of coating and the negative plate (spy is denoted as outermost layer negative plate 400) for using one side coating, make the outermost layer negative plate
The positive electrode active materials coat of 400 negative electrode active material coating layer positive plate adjacent thereto faces, and the outermost layer is negative
The exposed negative current collector surface 401 of pole piece 400 outwardly, the negative current collector surface 401 of outermost layer negative plate 400
It is contacted face-to-face with cathode head cover, is not necessarily to the cathode that the cathode and fastening lithium ionic cell of laminated body can be realized in welding at this time
Between electrical connection, be conducive to save space, and improve process efficiency.
2, when being laminated to the outermost layer of positive roof side, making the positive plate that the outermost layer is one side coating, (spy is denoted as most
Outer layer positive plate 700), the cathode of the positive electrode active materials coating layer double spread adjacent thereto of the outermost layer positive plate 700
The negative electrode active material coat of piece is opposite, the exposed plus plate current-collecting body surface 701 of the outermost layer positive plate 700 with
Positive head cover contacts face-to-face, is not necessarily to the anode that the anode and buckle type lithium-ion electricity battery of laminated body can be realized in welding at this time
Between electrical connection, be conducive to save space and improve process efficiency.
Therefore the present embodiment button laminated lithium ion battery further has below with respect to embodiment 2 beneficial to effect
Fruit：
The face cathode head cover of the present embodiment, the outermost layer of anode head cover are respectively the negative plate of one side coating, anode
Piece is contacted i.e. with cathode head cover, positive head cover face-to-face respectively by the afflux dignity of the negative plate of one side coating, positive plate
Cathode, the anode for realizing laminated body are external, are not necessarily to weld operation completely, using the present embodiment technical solution, are more advantageous to and carry
The efficiency of assembling of high button cell.
Embodiment 4：
Referring to shown in Figure 26-32.
Positive plate in the present embodiment can be, but not limited to similarly use positive plate bag making technique with embodiment 2.
The structure of positive plate, negative plate in the present embodiment can be identical as embodiment 1,2.
3 differences of the button laminated lithium ion battery of the present embodiment and embodiment essentially consist in：
After the positive plate of dual coating, negative plate are layered on top of each other according to the prior art：
1, when being laminated to the outermost negative plate of cathode roof side, which does not use two-sided painting
The negative plate of cloth and the negative plate (spy is denoted as outermost layer negative plate 400) for using one side coating, the outermost layer negative plate 400
The positive electrode active materials coat of negative electrode active material coating layer positive plate adjacent thereto faces, the outermost layer negative plate
400 exposed negative current collector surface 401 is in close contact face-to-face with cathode head cover, and being not necessarily to welding at this time can be real
Connection between the cathode and the cathode of fastening lithium ionic cell of existing laminated body is conducive to save space, and improves technique effect
Rate.
2, when being laminated to the outermost layer of face anode roof side, in single negative plate, (it can be that one side coating can also
For double spread, Figure 26-32 is signal with double spread) one layer of diaphragm 800 is laminated again outside, it is further laminated outside diaphragm 800
One shape and the size metal foil 900 consistent with the collector of positive plate, by the projecting piece 901 of the metal foil 900 with
First anode projecting piece 302 of the positive plate of other stackings welds together jointly, makes the metal foil 900 and positive head cover
It is in close contact face-to-face, is not necessarily to welding at this time and being electrically connected between the anode of laminated body and the anode of button cell can be realized,
Be conducive to save space, and improve process efficiency.
Therefore effect acquired by the present embodiment button laminated lithium ion battery is same as Example 3.
Analysis of experimental data：
In order to further illustrate the technique effect of the present embodiment, carry out preparing below a diameter of：16 millimeters, thickness 5.4
The fastening lithium ionic cell of millimeter, and experimental data is carried out to these fastening lithium ionic cells and compares analysis：
Comparative example 1：Button cell uses flat winding battery core bodies, and the edge and inner walls for winding battery core bodies offset
It touches；
Comparative example 2：Button cell uses rectangular laminated battery core, the apex angle and shell of laminated battery core inconsistent；
Embodiment 2：Button cell uses the laminated battery core of the embodiment of the present invention 2, pole piece therein to be all made of embodiment
1 structure；
Embodiment 3：Button cell uses the laminated battery core of the embodiment of the present invention 3, pole piece therein to be all made of embodiment
1 structure；
Embodiment 4：Button cell uses the laminated battery core of the embodiment of the present invention 4, pole piece therein to be all made of embodiment
1 structure；
It samples respectively the sampling ten of above-mentioned each button cell, sampling is tested, is obtained real shown in following table one
Test data：
Table one：Experimental data compares analytical table
| Project | Comparative example 1 | Comparative example 2 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Capacity | 85 | 90 | 110 | 120 | 120 |
| Discharge-rate | 1C | 1.5C | 3C | 3C | 3C |
Therefore using the present embodiment technical solution, is improving battery capacity compared with the existing technology and improving electricity
Significant effect can be obtained on the discharge-rate in pond.
Embodiments described above does not constitute the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution made by within the spirit and principle of mode
Within enclosing.
Claims (7)
1. a kind of pole piece suitable for fastening lithium ionic cell, characterized in that including：
The surface shape of collector, the collector is rounded, is respectively arranged with radially-inwardly on the surface of the collector
Recessed the first notch and outwardly directed first projecting piece of circular edge for radially outward exceeding the collector；
The active material coating layer on at least surface coated in the collector, the active material coating layer are covered in described
All other region of collection liquid surface in addition to first projecting piece.
2. the pole piece according to claim 1 suitable for fastening lithium ionic cell, characterized in that
It is also respectively provided with the second radially-inwardly recessed notch, third notch in the both sides of first projecting piece,
Second notch, third notch respectively in the both sides of first projecting piece, formed first projecting piece with it is described
The gap of the arc edge of collector.
3. the pole piece according to claim 1 suitable for fastening lithium ionic cell, characterized in that
First notch, the first projecting piece are located at two edges facing each other of the collector.
4. the pole piece according to claim 1 suitable for fastening lithium ionic cell, characterized in that
The active material coating layer has been respectively coated on two surfaces of the collector.
5. the pole piece according to claim 1 suitable for fastening lithium ionic cell, characterized in that
The collector is copper foil, and the active material coating layer is：Positive electrode active materials coating layer.
6. the pole piece according to claim 1 suitable for fastening lithium ionic cell, characterized in that
The collector is aluminium foil, and the active material coating layer is：Negative electrode active material coating layer.
7. a kind of fastening lithium ionic cell, characterized in that any pole piece including claim 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810048773.5A CN108305988A (en) | 2018-01-18 | 2018-01-18 | Button laminated lithium ion battery and the pole piece for being suitble to it to use |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810048773.5A CN108305988A (en) | 2018-01-18 | 2018-01-18 | Button laminated lithium ion battery and the pole piece for being suitble to it to use |
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| CN108305988A true CN108305988A (en) | 2018-07-20 |
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