CN208298950U - button laminated lithium ion battery - Google Patents
button laminated lithium ion battery Download PDFInfo
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- CN208298950U CN208298950U CN201820096487.1U CN201820096487U CN208298950U CN 208298950 U CN208298950 U CN 208298950U CN 201820096487 U CN201820096487 U CN 201820096487U CN 208298950 U CN208298950 U CN 208298950U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to field of lithium ion battery, disclose a kind of button laminated lithium ion battery, it includes positive plate, negative electrode tab, each surface topography is rounded, the first radially-inwardly recessed notch is respectively arranged on pole piece and radially outward beyond outwardly directed first projecting piece of circular edge of pole piece, it is exposed collector on two surfaces of the first projecting piece, the width of the first notch of pole piece is wider than the width with the first projecting piece of the opposite polarity pole piece of this pole piece.Face is laminated in each first positive projecting piece and each first cathode notch, and stretches out from the first cathode notch, and section of stretching out welds together jointly, is electrically connected with the positive top cover of button cell.Face is laminated in each first positive projecting piece and each first cathode notch, and stretches out from the first cathode notch, and section of stretching out welds together jointly, is electrically connected with the positive top cover of the button cell.Using the technical program, be conducive to the capacity and high rate performance that improve battery.
Description
Technical field
The utility model relates to lithium ion battery manufacturing field more particularly to a kind of button laminated lithium ion batteries.
Background technique
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 deficiencies limit
The application of button cell is not able to satisfy demand of the people to high capacity and high-multiplying-power battery more and more yet.
Utility model content
The first purpose of the utility model embodiment is to provide a kind of button laminated lithium ion battery, using this technology side
Case is conducive to the capacity and high rate performance that improve battery.
In a first aspect, a kind of button laminated lithium ion battery provided by the embodiment of the utility model, comprising:
Negative electrode tab, surface topography is rounded, and the first radially-inwardly recessed cathode is respectively arranged in the negative electrode tab
Notch and the outwardly directed first cathode projecting piece of circular edge for radially outward exceeding the negative electrode tab, described first
Two surfaces of cathode projecting piece are exposed collector, and the width of the first cathode notch is wider than the width of the first positive projecting piece
Degree,
Positive plate, surface topography is rounded, and described first be radially-inwardly recessed is respectively arranged on the positive plate
Positive notch and the positive projecting piece of circular edge outwardly directed first for radially outward exceeding the negative electrode tab, described
Two surfaces of the first positive projecting piece are exposed collector substrate,
Each negative electrode tab, positive plate are layered on top of each other composition laminated body, in the laminated body, arbitrary neighborhood two described in
A membrane layer has been respectively separated between negative electrode tab, positive plate,
Face is laminated in each first cathode notch, and face is laminated in each first cathode projecting piece,
Face is laminated in each cathode projecting piece and each described first positive notch, and stretches from the described first positive notch
Out, and section of stretching out welds together jointly；
Face is laminated in each described first positive notch, and face is laminated in each described first positive projecting piece,
Each first positive projecting piece and each first cathode notch are laminated face, and from the first cathode notch
It stretches out, and section of stretching out welds together jointly；
On the laminated body, the outermost layer of anode roof side described in face are as follows: only one side coating positive electrode active materials apply
The exposed positive plate of layer of cloth, another side plus plate current-collecting body, the exposed anode of the outermost positive plate
Afflux dignity contacts face-to-face with the positive top cover；
The positive electrode active materials coating layer of the outermost positive plate has negative by membrane layer and the dual coating at interval
The negative electrode tab of pole active material coating layer faces；
On the laminated body, the outermost layer of cathode roof side described in face are as follows: only coat the negative electrode active material on one side
Expect coating layer, the exposed negative electrode tab of another side negative current collector, the outermost negative electrode tab it is exposed
Negative pole currect collecting dignity contacts face-to-face with the cathode top cover,
The negative electrode active material coating layer of the outermost negative electrode tab has just by the membrane layer and dual coating at interval
The positive plate of pole active material coating layer faces.
Optionally, each positive plate, which is respectively implanted, is laid in each diaphragm bag, and the diaphragm bag is by upper layer and lower layer diaphragm
Face is constituted, and the diaphragm bag is also respectively provided in identical as the arc-shaped shape of the negative electrode tab on the diaphragm bag
Radially-inwardly the first recessed diaphragm notch, the second diaphragm notch, the described first positive projecting piece is from the first diaphragm notch
It stretches out, the described first positive notch is made to be located at the second diaphragm indentation, there；
Each negative electrode tab, positive plate are layered on top of each other composition laminated body, in the laminated body, arbitrary neighborhood two described in
A membrane layer has been respectively separated between negative electrode tab, positive plate, specifically:
Merging has each diaphragm bag of the positive plate to be mutually laminated with the negative electrode tab；
Each first cathode projecting piece is faced with the second diaphragm notch respectively, and from the second diaphragm notch
It stretches out.
Optionally, the surrounding of the diaphragm bag is provided with continuous or discontinuous packaging line.
Optionally, the second radially-inwardly recessed anode is also respectively provided in the two sides of the described first positive projecting piece to lack
Mouth, third anode notch,
Described second positive notch, third anode notch are located at the two sides of the described first positive projecting piece, form institute
State the gap of the arc edge of the first positive projecting piece and the positive plate.
Optionally, the second radially-inwardly recessed cathode is also respectively provided in the two sides of the first cathode projecting piece to lack
Mouth, third cathode notch,
The second cathode notch, third cathode notch are located at the two sides of the first cathode projecting piece, form institute
State the gap of the arc edge of the first cathode projecting piece and the negative electrode tab.
Optionally, the first cathode notch, the first cathode projecting piece are located at two mutual radial directions of the negative electrode tab
Opposite edge；
Described first positive notch, the first positive projecting piece are located at two side mutually diametrically of the positive plate
Edge.
Optionally, the outermost layer of the laminated body is equal are as follows: only coats the negative electrode active material coating layer, another side on one side
The exposed negative electrode tab of negative current collector,
The cathode top cover faces face contact with the exposed negative current collector is located at.
Optionally, between the positive top cover body and the outermost negative electrode tab of the laminated body between be separated with an insulation
Piece,
Each first positive projecting piece of the laminated body welded together pass through the insulating trip and it is described just
Pole top cover body is welded to connect.
Optionally, the insulating trip is rounded, and one and the described first positive projecting piece phase are provided in the circle
The insulating trip notch matched, the width of the insulating trip notch are greater than the width of described one positive projecting piece,
The each described first positive projecting piece of the laminated body welded together passes through the insulating trip notch and institute
Positive top cover is stated to be welded to connect.
Optionally, the width of each described first positive notch is wider than the width of each first cathode projecting piece.
Optionally, the width of each first cathode notch is wider than the width of each described first positive projecting piece.
Optionally, on the laminated body, the outermost layer of anode roof side described in face is metal foil, the metal foil
The top surface of piece and the positive top cover connect, and are membrane layer in the bottom surface of the metal foil.
Optionally, described metal foil are as follows: the plus plate current-collecting body.
Optionally, on the laminated body, the outermost layer of cathode roof side described in face is only to coat the cathode on one side
Active material coating layer, the exposed negative electrode tab of another side negative current collector, the outermost negative electrode tab it is exposed
Negative pole currect collecting dignity outside contacts face-to-face with the cathode top cover.
Therefore using the utility model embodiment technical solution, since the present embodiment uses Special-shaped lithium ion battery
It can be matched with the arc inner wall of button laminated lithium ion battery with the shape of pole piece, pole piece, its inner wall can be bonded completely, sufficiently benefit
With the intracavity space of button laminated lithium ion battery, the coated side of the active material of pole piece is improved to the maximum extent, is conducive to
Improve the capacity of 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, and the first notch is stretched as the first of the pole piece opposite with this pole piece
Slice faces, and stretches out the first projecting piece of the pole piece opposite with this pole piece mutually from the notch of this pole piece, realizes opposed polarity
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 mention
The capacity of high button cell, and be conducive to avoid battery short circuit, improve the safety of battery.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
It does not constitute improper limits to the present invention.
Fig. 1 is a kind of master for pole piece suitable for button laminated lithium ion battery that the utility model embodiment 1 provides
Depending on structural 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 schematic perspective view of Fig. 1；
Fig. 5 is a kind of merging suitable for button laminated lithium ion battery that the utility model embodiment 2,3,4 provides
There is the schematic view of the front view of positive plate 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 schematic perspective view of Fig. 4；
Fig. 9 is a kind of schematic view of the front view for insulating trip that the utility model embodiment 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 schematic perspective view of Fig. 9；
Figure 13 is a kind of schematic view of the front view for button laminated lithium ion battery that the utility model embodiment 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 schematic perspective view of Figure 13；
Figure 18 is the assembling structure schematic diagram of Figure 13；
Figure 19 is a kind of schematic view of the front view for button laminated lithium ion battery that the utility model embodiment 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 19；
Figure 24 is the schematic perspective view of Figure 19；
Figure 25 is the assembling structure schematic diagram of Figure 19；
Figure 26 is a kind of schematic view of the front view for button laminated lithium ion battery that the utility model embodiment 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 schematic perspective view of Figure 26；
Figure 32 is the assembling structure schematic diagram of Figure 26.
Appended drawing reference:
100: collector；101: active material coating layer；102: the first notches；
103: the first projecting pieces；104: the second notches；105: third notch；
201: the first cathode notches；202: the first cathode projecting pieces；
203: the second cathode notches；204: third cathode notch；
301: the first positive notches；302: the first positive projecting pieces；
303: the second positive notches；304: third anode notch；
400: outermost layer single side negative electrode tab；
401: the negative current collector surface of outermost layer single side negative electrode tab 400；
500: diaphragm bag；501: the first diaphragm notches；
502: the second diaphragm notches；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 embodiment
The utility model is described in detail below in conjunction with attached drawing and specific embodiment, in the signal of this utility model
Property embodiment and explanation be used to explain the utility model, but be not intended to limit the scope of the present invention.
Embodiment 1
Referring to a kind of pole piece suitable for button laminated lithium ion battery shown in Fig. 1-4, is present embodiments provided, wrap
It includes: 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 material 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 material when current pole piece is negative electrode tab
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, be respectively arranged on collector 100 it is radial to
An interior recessed notch (under be denoted as the first notch 102) and the radially outward circular edge 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
It is covered with active material, and keeps its collector 100 exposed outside.
As the signal of the present embodiment, above structure is pressed when the two sides of the collector 100 in the present embodiment and is 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 the utility model embodiment technical solution, since the present embodiment uses Special-shaped lithium ion battery
It can be matched with the arc inner wall of button laminated lithium ion battery with the shape of pole piece, pole piece, its inner wall can be bonded completely, sufficiently benefit
With the intracavity space of button laminated lithium ion battery, the coated side of the active material of pole piece is improved to the maximum extent, is conducive to
Improve the capacity of 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 lacking from this pole piece
Mouth 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 mention
The capacity of high button cell, and be conducive to avoid battery short circuit, improve the safety of battery.
As the present embodiment signal rather than limit, also divide in the two 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 position
In the two sides of the first projecting piece 103, gap of two notch as the first projecting piece 103 and the arc edge of collector 100 is adopted
It is provided with this and is conducive to position the first projecting piece 103 and pole piece during lamination, it is ensured that polarity stacked on top of one another
Identical first projecting piece, about 103 face, avoids pole piece from shifting.
As the present embodiment signal rather than limit, the first notch 102 of pole piece, the first projecting piece 103 can be distinguished
Two mutual radial face edges of collector 100 are set, in this way, using laminated body obtained by the stacking of the present embodiment structure pole piece
Electrode be located at two both sides diametrically of the cylindrical layer stack, keep the distance between electrode farthest, to greatest extent
Ground avoids electric pole short circuit, improves the safety of battery.
Embodiment 2:
Button laminated lithium ion battery is made using the positive plate of structure described in above-described embodiment 1, negative electrode tab below:
Referring to shown in Fig. 5-18, the button laminated lithium ion battery of the present embodiment specifically includes that button shell, the shell by
Upper top cover, lower top cover and the dead ring that is spaced between upper top cover, lower top cover are constituted, upper upper top cover, lower top cover circle open
Mouth fastening facing each other, forms shell, and the laminated body constituted is laminated by positive plate, negative electrode tab in intracavitary be provided in shell.
The laminated body specific structure is as follows:
The structure that intracorporal each negative electrode tab is laminated is as described in example 1 above, for convenience, by negative electrode tab radially to
Interior the first recessed notch is denoted as: the first cathode notch 201, and the circular edge for radially outward exceeding negative electrode tab is outwardly directed
First projecting piece is denoted as: the first cathode projecting piece 202.It is exposed cathode collection on two surfaces of the first cathode projecting piece 202
Fluid.
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
The positive projecting piece 302 of the first of piece stretched out from the first cathode notch 201 of negative electrode tab and with 201 two sides of the first cathode notch also
It is provided with certain gap, further facilitates the positioning of the first positive projecting piece 302, and is conducive to avoid from notch stretching
First positive projecting piece 302 is in contact with negative electrode tab causes battery short circuit.
The structure that intracorporal each positive plate is laminated is as described in example 1 above, for convenience, by positive plate radially to
Interior the first recessed notch is denoted as: the first positive notch 301, and the circular edge for radially outward exceeding positive plate is outwardly directed
First projecting piece is denoted as: the first positive projecting piece 302.It is exposed anode collection on two surfaces of the first positive projecting piece 302
Fluid.
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 two sides of positive notch also
There is gap, further facilitate the positioning of the first cathode projecting piece 202, and is conducive to that the first cathode stretched out from the notch is avoided to stretch
Slice 202 is in contact with positive plate causes battery short circuit.
Above-mentioned positive plate, negative electrode tab are mutually laminated to obtain whole laminated body cylindrical, in the laminated body, arbitrarily
A membrane layer has been respectively separated between adjacent negative electrode tab, positive plate:
Each first cathode projecting piece 202 is laminated face, and the first all cathode projecting pieces 202 faces stacking with all
Face above and below first 301 phase of positive notch, and stretched out outside cylinder from the first positive notch 301 of the stacking, stacking is stretched
The section of stretching out of each first cathode projecting piece 202 outside welds together jointly out, then electric with the cathode top cover of button cell
Connection forms the cathode of button laminated lithium ion battery.
Each first positive projecting piece 302 is laminated face, and all first positive projecting piece 302 faces stacking with all
Face above and below first cathode notch, 201 phase, and stretched out outside circular edge from the first cathode notch 201 of the stacking, it will be laminated
The section of stretching out of the positive projecting piece 302 of first to extend welds together jointly, then again with the positive top cover of button cell
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
Laminated body it is integrally cylindrical, the laminated body to the maximum extent with complete of the inner cavity of the shell of button laminated lithium ion battery
Match, make 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 201 phase of the first cathode notch that is layered on top of each other
Upper and lower face and it is located in the first cathode notch 201 of the stacking, the positive projecting piece 302 of the first of the stretching and each first cathode
The negative electrode tab edge on the both sides of notch 201 is respectively provided with certain gap, can be to avoid the first positive projecting piece 302 and negative electrode tab
It contacts and leads to short circuit；
Similarly, make the first cathode projecting piece 202 of all phases stacking respectively and on the first positive notch 301 for being mutually laminated
Lower face and it is located 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, avoid the first cathode projecting piece 202 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.
As the present embodiment signal rather than limit, 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, specific as follows:
Each positive plate is respectively implanted in diaphragm bag 500, is laid in it in diaphragm bag 500, and diaphragm bag 500 is by upper layer and lower 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
And above and below the arcuate profile of diaphragm bag 500 is identical as the circle-arc profile of negative electrode tab and size is identical when it is laminated with negative electrode tab
Layer size is consistent.The first radially-inwardly recessed diaphragm notch 501, the second diaphragm notch are respectively arranged on diaphragm bag 500
502, the positive projecting piece 302 of the first of positive plate is stretched out from the first diaphragm notch 501 of diaphragm bag 500, and the first of positive plate is just
Pole 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 electrode tab stacked on top of one another one by one, make to be laminated
Each negative electrode tab the first cathode projecting piece 202 respectively with about 502 face of the second diaphragm notch of the diaphragm bag of stacking 500,
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 belong to the preferred of the present embodiment and optionally
Technical characteristic is designed using the second diaphragm notch 502, is not only improved and is reduced diaphragm cost, is further facilitating merging just
Positioning of the pole piece in diaphragm bag 500, avoids shifting, and in stacking, is also used as the stacking face with negative electrode tab
Anchor point is conducive to the positioning of each laminates when stacking, avoids laminates from shifting, keep the stacking of laminated body more smooth, improves
Stack efficiency and stacking flatness.
As the present embodiment signal rather than limit, be 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 upper and lower level diaphragm is made mutually to heat combination to be opposed
The packaging line 503 formed together；Or to merging have positive plate diaphragm bag 500 carry out laser spot welding make upper and lower level every
Film mutually heats the packaging line 503 being combined together to form；The packaging line 503 can be continuous, or it is discrete,
In preferably use discontinuous 503 structure of packaging line, be further conducive to the immersion of electrolyte using the discontinuous encapsulating structure,
Improve fluid injection speed.
As the present embodiment signal rather than limit, as described in Example 1 similarly, on every positive plate, first anode
The two sides of projecting piece 302 are also respectively provided with the second radially-inwardly recessed positive notch 303, third anode notch 304.This
Two positive notches 303, third anode notch 304 are located at the two sides of the first positive projecting piece 302, form the first anode and stretch out
The gap of the arc edge of piece 302 and anode.It is designed using the gap, makes the reference position positioned when stacking to each lamination
Other than the first positive projecting piece 302, may further also using the second positive notch 303, third anode notch 304 into
Row positioning alignment, avoids laminates from deviating, improves the flatness of stacking.
Similarly, as the signal of the present embodiment rather than limit, as described in Example 1 similarly, in every negative electrode tab, first
The two sides of 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 two sides of the first cathode projecting piece 202, form first
The gap of the arc edge of cathode projecting piece 202 and cathode.It is designed using the gap, makes to position each laminates when stacking
Position other than the first cathode projecting piece 202, may further also utilize the second cathode notch 203, third cathode notch
204 are positioned, and laminates is avoided to deviate, and improve 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 electrode tab)
202) the second positive notch 303, third anode notch 304 (or the second cathode notch 203, third cathode is respectively set in two sides
Notch 204), make to occur certain offset even if a certain positive plate (or negative electrode tab), the first positive projecting piece 302 (or first
Cathode projecting piece 202) it is also not easy to be in contact with the circular arc rim of negative electrode tab (or positive plate), avoid short circuit.
As the present embodiment signal rather than limit, the buckle type lithium-ion laminated batteries of the present embodiment can use below
Structure:
According to the lamination process of the prior art, by the positive plate of the active material coat of double spread, (wherein positive plate can
With but be not limited to be embedded in diaphragm bag 500), negative electrode tab be laminated and to form laminated body, keep any positive electrode active materials coat equal
Face has a negative electrode active material coat, and in the negative electrode tab of laminated body outermost layer (containing the bottom and top), (spy is denoted as
Outermost layer single side negative electrode tab 400) when, the negative electrode tab of one side coating is no longer used using the negative electrode tab of double spread at this time, is made
The positive electrode active materials of the negative electrode active material coating layer of the outermost layer single side negative electrode tab 400 positive plate adjacent thereto coat
Layer faces, and the exposed negative current collector surface 401 of outermost layer single side negative electrode tab 400 is outwardly.
In cathode roof side, make the negative pole currect collecting of the outermost layer single side negative electrode tab 400 of cathode top cover and this cathode roof side
Body surface face 401 faces face contact, realizes the company of the cathode of laminated body cathode and fastening lithium ionic cell without welding 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 top cover, then the first anode welded together on laminated body is stretched
Slice 302 is welded on positive top cover, realizes the connection of the anode of laminated body and the anode of fastening lithium ionic cell.
As the present embodiment signal rather than limit, the insulating trip 600 of the present embodiment is preferably but not limited to using Fig. 9-12
Shown structure:
The insulating trip 600 is rounded, and one and first diameter that matches of positive projecting piece 302 are provided on circular edge
To recessed insulating trip notch 601, and make the width of the insulating trip notch 601 slightly larger than the width of the first positive projecting piece 302
Degree makes the welded together on laminated body first positive projecting piece 302 pass through the insulating trip notch 601 and welds with positive top cover
Connection, insulating trip 600 include the bending for being conducive to avoid the first positive projecting piece 302 of lamellar body using the insulating gaps.
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 electrode tab in the present embodiment can be identical as embodiment 1,2.
The button laminated lithium ion battery of the present embodiment is essentially consisted in 2 differences of embodiment:
After the negative electrode tab 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 electrode tab 400 for being laminated to cathode roof side, which does not use two-sided painting
The negative electrode tab of cloth and the negative electrode tab (spy is denoted as outermost layer negative electrode tab 400) for using one side coating, make the outermost layer negative electrode tab 400
The positive electrode active materials coat of negative electrode active material coating layer positive plate adjacent thereto faces, the outermost layer negative electrode tab
400 exposed negative current collector surface 401 outwardly, the negative current collector surface 401 of outermost layer negative electrode tab 400 and cathode
Top cover contacts face-to-face, and the electricity between the cathode of laminated body and the cathode of fastening lithium ionic cell can be realized without welding at this time
Connection is conducive to save space, and improves process efficiency.
2, when being laminated to the outermost layer of positive roof side, making the positive plate of the outermost layer one side coating, (spy is denoted as most
Outer layer positive plate 700), the cathode of the positive electrode active materials coating layer of the outermost layer positive plate 700 double spread adjacent thereto
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 just
Pole top cover contacts face-to-face, can be realized between the anode of laminated body and the anode of buckle type lithium-ion electricity battery without welding at this time
Electrical connection, be conducive to save space and improve process efficiency.
Therefore the present embodiment button laminated lithium ion battery further has the advantages that with respect to embodiment 2
The face cathode top cover of the present embodiment, positive top cover outermost layer be respectively the negative electrode tab of one side coating, positive plate,
It contacts realize face-to-face with cathode top cover, positive top cover respectively by the negative electrode tab of one side coating, the afflux dignity of positive plate
The cathode of laminated body, anode are external, completely without welding operation, using the present embodiment technical solution, are more advantageous to raising button
The assembly efficiency of formula battery.
Embodiment 4:
Referring to fig. 2 shown in 6-32.
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 electrode tab in the present embodiment can be identical as embodiment 1,2.
The button laminated lithium ion battery of the present embodiment is essentially consisted in 3 differences of embodiment:
After the positive plate of dual coating, negative electrode tab are layered on top of each other according to the prior art:
1, when being laminated to the outermost negative electrode tab of cathode roof side, which does not use double spread
Negative electrode tab and use one side coating negative electrode tab (spy is denoted as outermost layer negative electrode tab 400), the cathode of the outermost layer negative electrode tab 400
The positive electrode active materials coat of active material coating layer positive plate adjacent thereto faces, the outermost layer negative electrode tab 400
Exposed negative current collector surface 401 is in close contact face-to-face with cathode top cover, and stacking can be realized without welding at this time
Connection between the cathode of body and the cathode of fastening lithium ionic cell is conducive to save space, and improves process efficiency.
2, when being laminated to the outermost layer of face anode roof side, in single negative electrode tab, (it can also be with for one side coating
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
The consistent metal foil 900 of the collector of one shape and size and positive plate, by the projecting piece 901 of the metal foil 900 with
The positive projecting piece 302 of the first of the positive plate of other stackings welds together jointly, makes the metal foil 900 and positive top cover
It is in close contact face-to-face, being electrically connected between the anode of laminated body and the anode of button cell can be realized without welding at this time,
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 technical effect of the present embodiment, carry out preparing diameter below are as follows: 16 millimeters, with a thickness of 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
Touching；
Comparative example 2: button cell uses rectangular laminated battery core, and the apex angle and shell of laminated battery core are inconsistent；
Embodiment 2: button cell uses the laminated battery core of the utility model embodiment 2, and pole piece therein is all made of reality
Apply the structure of example 1；
Embodiment 3: button cell uses the laminated battery core of the utility model embodiment 3, and pole piece therein is all made of reality
Apply the structure of example 1；
Embodiment 4: button cell uses the laminated battery core of the utility model embodiment 4, and pole piece therein is all made of reality
Apply the structure of example 1；
It samples respectively sampling ten of above-mentioned each button cell, sampling is tested, obtain 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 scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (14)
1. a kind of button laminated lithium ion battery, characterized in that include:
Negative electrode tab, surface topography is rounded, be respectively arranged in the negative electrode tab the first radially-inwardly recessed cathode notch,
And radially outward exceed the outwardly directed first cathode projecting piece of circular edge of the negative electrode tab, it is stretched in first cathode
Two surfaces of slice are exposed collector, and the width of the first cathode notch is wider than the width of the first positive projecting piece,
Positive plate, surface topography is rounded, and radially-inwardly recessed first anode is respectively arranged on the positive plate
Notch and the positive projecting piece of circular edge outwardly directed first for radially outward exceeding the negative electrode tab, described first
Two surfaces of positive projecting piece are exposed collector substrate,
Each negative electrode tab, positive plate are layered on top of each other composition laminated body, in the laminated body, the cathode of the two of arbitrary neighborhood
A membrane layer has been respectively separated between piece, positive plate,
Face is laminated in each first cathode notch, and face is laminated in each first cathode projecting piece,
Face is laminated in each cathode projecting piece and each described first positive notch, and stretches out from the described first positive notch, and
Section of stretching out welds together jointly；
Face is laminated in each described first positive notch, and face is laminated in each described first positive projecting piece,
Face is laminated in each described first positive projecting piece and each first cathode notch, and stretches from the first cathode notch
Out, and section of stretching out welds together jointly；
On the laminated body, the outermost layer of anode roof side described in face are as follows: only one side coating positive electrode active materials coating layer,
The exposed positive plate of another side plus plate current-collecting body, the exposed plus plate current-collecting body of the outermost positive plate
Face contacts face-to-face with the positive top cover；
The positive electrode active materials coating layer of the outermost positive plate has cathode living by the membrane layer and dual coating at interval
The negative electrode tab of property material coating layer faces；
On the laminated body, the outermost layer of cathode roof side described in face are as follows: only coat the negative electrode active material on one side and apply
Layer of cloth, the exposed negative electrode tab of another side negative current collector, the exposed cathode of the outermost negative electrode tab
Afflux dignity contacts face-to-face with the cathode top cover,
The negative electrode active material coating layer of the outermost negative electrode tab has positive work by the membrane layer and dual coating at interval
The positive plate of property material coating layer faces.
2. button laminated lithium ion battery according to claim 1, characterized in that
Each positive plate, which is respectively implanted, to be laid in each diaphragm bag, and the diaphragm bag is made of upper layer and lower layer diaphragm face, institute
Diaphragm bag is stated in identical as the arc-shaped shape of the negative electrode tab, is also respectively provided on the diaphragm bag and is radially-inwardly recessed
The first diaphragm notch, the second diaphragm notch, the first positive projecting piece stretches out from the first diaphragm notch, makes described the
One positive notch is located at the second diaphragm indentation, there；
Each negative electrode tab, positive plate are layered on top of each other composition laminated body, in the laminated body, the cathode of the two of arbitrary neighborhood
A membrane layer has been respectively separated between piece, positive plate, specifically:
Merging has each diaphragm bag of the positive plate to be mutually laminated with the negative electrode tab；
Each first cathode projecting piece is faced with the second diaphragm notch respectively, and is stretched from the second diaphragm notch
Out.
3. button laminated lithium ion battery according to claim 2, characterized in that
The surrounding of the diaphragm bag is provided with continuous or discontinuous packaging line.
4. button laminated lithium ion battery according to claim 1, characterized in that
The second radially-inwardly recessed positive notch, third anode are also respectively provided in the two sides of the described first positive projecting piece
Notch,
The second positive notch, third anode notch are located at the two sides of the described first positive projecting piece, form described the
The gap of the arc edge of one positive projecting piece and the positive plate.
5. button laminated lithium ion battery according to claim 1, characterized in that
The second radially-inwardly recessed cathode notch, third cathode are also respectively provided in the two sides of the first cathode projecting piece
Notch,
The second cathode notch, third cathode notch are located at the two sides of the first cathode projecting piece, form described the
The gap of one cathode projecting piece and the arc edge of the negative electrode tab.
6. button laminated lithium ion battery according to claim 1, characterized in that
The first cathode notch, the first cathode projecting piece are located at two edge mutually diametrically of the negative electrode tab；
Described first positive notch, the first positive projecting piece are located at two edge mutually diametrically of the positive plate.
7. button laminated lithium ion battery according to claim 1, characterized in that
The outermost layer of the laminated body is equal are as follows: only coats the negative electrode active material coating layer, another side negative current collector on one side
The exposed negative electrode tab,
The cathode top cover faces face contact with the exposed negative current collector is located at.
8. button laminated lithium ion battery according to claim 7, characterized in that
It is separated with an insulating trip between the positive top cover body and the outermost negative electrode tab of the laminated body,
The each described first positive projecting piece of the laminated body welded together passes through the insulating trip and the anode pushes up
Lid is welded to connect.
9. button laminated lithium ion battery according to claim 8, characterized in that
The insulating trip is rounded, and the insulating trip that one matches with the described first positive projecting piece is provided in the circle and is lacked
Mouthful, the width of the insulating trip notch is greater than the width of described one positive projecting piece,
Each first positive projecting piece of the laminated body welded together pass through the insulating trip notch and it is described just
Pole top cover is welded to connect.
10. button laminated lithium ion battery according to claim 1, characterized in that
The width of each described first positive notch is wider than the width of each first cathode projecting piece.
11. button laminated lithium ion battery according to claim 1, characterized in that
The width of each first cathode notch is wider than the width of each described first positive projecting piece.
12. button laminated lithium ion battery according to claim 1, characterized in that
On the laminated body, the outermost layer of anode roof side described in face be metal foil, the top surface of the metal foil with
The anode top cover connects, and is membrane layer in the bottom surface of the metal foil.
13. button laminated lithium ion battery according to claim 12, characterized in that
Described metal foil are as follows: the plus plate current-collecting body.
14. button laminated lithium ion battery according to claim 1, characterized in that
On the laminated body, the outermost layer of cathode roof side described in face is only to coat the negative electrode active material coating on one side
Layer, the exposed negative electrode tab of another side negative current collector, the exposed cathode collection of the outermost negative electrode tab
Fluid surface contacts face-to-face with the cathode top cover.
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|---|---|---|---|
| CN201820096487.1U CN208298950U (en) | 2018-01-18 | 2018-01-18 | button laminated lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820096487.1U CN208298950U (en) | 2018-01-18 | 2018-01-18 | button laminated lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400377A (en) * | 2018-01-18 | 2018-08-14 | 深圳市格瑞普电池有限公司 | Button laminated lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400377A (en) * | 2018-01-18 | 2018-08-14 | 深圳市格瑞普电池有限公司 | Button laminated lithium ion battery |
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