CN103427108B - A kind of lithium rechargeable battery and the method making lithium rechargeable battery - Google Patents
A kind of lithium rechargeable battery and the method making lithium rechargeable battery Download PDFInfo
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- CN103427108B CN103427108B CN201210160904.1A CN201210160904A CN103427108B CN 103427108 B CN103427108 B CN 103427108B CN 201210160904 A CN201210160904 A CN 201210160904A CN 103427108 B CN103427108 B CN 103427108B
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- battery core
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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 invention discloses a kind of lithium rechargeable battery and the method making lithium rechargeable battery, this lithium rechargeable battery includes polymer battery core, cell circuit board and battery case, wherein, electrostrictive polymer in-core is equipped with positive pole battery core pole piece, negative pole battery core pole piece and is arranged at the isolating membrane between positive pole battery core pole piece and negative pole battery core pole piece, polymer battery core outer enclosure has encapsulating film, encapsulating film includes side seal and closedtop, and this closedtop can be to place, the top plane bending of polymer battery core.This lithium rechargeable battery has higher energy density and capacity.
Description
Technical field
The present invention relates to secondary cell, a kind of lithium rechargeable battery and making lithium
The method of ion secondary battery.
Background technology
Lithium rechargeable battery because having that specific capacity is big, discharge capacity advantages of higher and be widely used in hands
In the electronic products such as machine, notebook, digital camera.
In lithium rechargeable battery mainly by polymer battery core, battery protection wiring board, gluing cap and
Lower glue cap compositions etc. form.When carrying out lithium rechargeable battery encapsulation, each portion of lithium rechargeable battery
Space shared by point is the most fixing, and wherein, this electrostrictive polymer core inner then includes anode pole piece, isolation
Film and cathode pole piece, and deviate from one end of isolating membrane at anode pole piece and there is the battery core closedtop of specified altitude assignment enter
Row encapsulation, owing to battery core closedtop occupies the certain altitude of this polymer battery core, thus decreases this polymerization
The useful space within thing battery core.And the energy of the space availability ratio lithium rechargeable battery of polymer battery core
Density and capacity have relatively Important Relations, general, and the space availability ratio of this polymer battery core is the biggest, this lithium from
Energy density and the capacity of sub-secondary cell are the biggest, and therefore, existing lithium rechargeable battery is generally deposited
Due to the space availability ratio of polymer battery core low, and the energy density of the lithium rechargeable battery caused
The problem relatively low with capacity.
Summary of the invention
In view of this, the present invention provides a kind of lithium rechargeable battery and makes the side of lithium rechargeable battery
Method, has higher energy density and capacity in this battery.
For achieving the above object, the present invention provides following technical scheme: a kind of lithium rechargeable battery, bag
Including polymer battery core, cell circuit board and battery case, wherein, described electrostrictive polymer in-core is equipped with positive electrical
Core pole piece, negative pole battery core pole piece and be arranged between described positive pole battery core pole piece and negative pole battery core pole piece
Isolating membrane, described polymer battery core outer enclosure has encapsulating film, described encapsulating film to include side seal and closedtop,
Described closedtop is arranged at described polymer battery core top, and wherein, the top of described polymer battery core is close
One end of described battery circuit board, described closedtop can be to place, the top plane bend of described polymer battery core
Folding.
Preferably, described positive pole battery core pole piece offers some otch near one end of described closedtop；
Described negative pole battery core offers and identical number on described positive pole battery core pole piece near one end of described closedtop
The otch of amount；
Described positive pole battery core pole piece and described negative pole battery core pole piece coiling form described polymer battery core, and institute
State the otch on positive pole battery core pole piece overlapped with the otch of described negative pole battery core pole piece, described phase mutual respect
Folded otch forms corner cut on the top of polymer battery core with sidewall junction；
Described closedtop can be along described corner cut to place, the top plane bending of described polymer battery core.
Preferably, described closedtop is to place, the top plane bending of described polymer battery core, and described closedtop
The plane at place is perpendicular to described side seal place plane.
Preferably, described closedtop is that flexible material is made.
Preferably, on the top of described polymer battery core, respectively from described positive pole battery core pole piece and negative pole
The positive pole drawn on battery core pole piece and negative pole, and described battery circuit board is connected with described positive pole and negative pole.
Preferably, described corner cut is the circular arc corner cut with certain radius.
Preferably, described electrostrictive polymer in-core also includes: electrolyte.
On the other hand, a kind of method making lithium rechargeable battery, including:
Prepare positive pole battery core pole piece and negative pole battery core pole piece；
Utilize described positive pole battery core pole piece and described negative electrode chip structure polymer battery core, and described
Between positive pole battery core pole piece and described negative pole battery core pole piece, isolating membrane is set；
The sidewall of described polymer battery core is packaged, obtains side seal；
It is packaged forming closedtop to the top of described polymer battery core；
By described closedtop to place, the top plane bending of described polymer battery core.
Preferably, described positive pole battery core pole piece and described negative electrode chip structure polymer battery core are utilized
Before sidewall, also include: offer some otch in the setting position of described positive pole battery core pole piece；
Offer on position and equal number on described positive pole battery core pole piece arranging of described negative pole battery core pole piece
Otch；
When utilizing the sidewall of described positive pole battery core pole piece and described negative electrode chip structure polymer battery core,
Otch on described positive pole battery core pole piece and described negative electrode chip is overlapping, and wind described positive electrical
Core pole piece and described negative pole battery core piece structure polymer battery core, otch overlapping after winding is at electrostrictive polymer
On core, top and sidewall junction form corner cut；
The described sidewall to described polymer battery core is packaged, and obtains side seal, including:
The sidewall of described polymer battery core is packaged, obtains side seal, and at described side seal with described
The position that corner cut in polymer battery core overlaps fits with described corner cut.
Preferably, described described closedtop is bent to place, the top plane of described polymer battery core,
Including:
By closedtop along described corner cut to place, the top plane bending of described polymer battery core.
Preferably, by described closedtop along described corner cut to place, the top plane bending of described polymer battery core,
Specifically include:
By described closedtop along described corner cut to place, the top plane bending of described polymer battery core, until institute
The plane stating closedtop place is perpendicular to described side seal place plane.
Preferably, described corner cut is the circular arc corner cut with certain radius.
Preferably, also include:
On the top of described polymer battery core, respectively from described positive pole battery core pole piece and negative pole battery core pole piece
The positive pole of upper extraction and negative pole, and described battery circuit board is connected with described positive pole and negative pole.
Understand via above-mentioned technical scheme, compared with prior art, present disclosure provides a kind of lithium
Ion secondary battery and the method making lithium rechargeable battery, this lithium rechargeable battery includes polymer
Battery core, cell circuit board and battery case, wherein, electrostrictive polymer in-core is equipped with positive pole battery core pole piece, negative pole
Battery core pole piece and be arranged at the isolating membrane between this positive pole battery core pole piece and negative pole battery core pole piece, this polymerization
Thing battery core outer enclosure has encapsulating film, and this encapsulating film includes side seal and closedtop, and closedtop is arranged at electrostrictive polymer
Core top and be perpendicular to place, polymer battery core top plane, this closedtop can be to described polymer battery core
Top bending.Owing to this closedtop is to the top bending of polymer battery core, thus decreases closedtop and take polymerization
The height of thing battery core, and then improve the space availability ratio of polymer battery core, and then improve lithium ion two
The energy density of primary cell and capacity.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 shows the hierarchical structure schematic diagram of existing lithium rechargeable battery；
Fig. 2 shows the composition structural representation of polymer battery core in the lithium rechargeable battery of the present invention；
Fig. 3 shows the structural representation of the positive pole battery core pole piece of polymer battery core in the present invention；
Fig. 4 shows the structural representation of lithium rechargeable battery in the present invention；
Fig. 5 shows that the flow process of a kind of one embodiment of method making lithium rechargeable battery of the present invention is shown
It is intended to；
Fig. 6 shows the flow process of a kind of another embodiment of method making lithium rechargeable battery of the present invention
Schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Due to the polymer in the energy density of lithium rechargeable battery and capacity, with lithium rechargeable battery
The space availability ratio of battery core is relevant, general, when the space profit of polymer battery core in lithium rechargeable battery
The highest by rate, the space availability ratio of this lithium rechargeable battery is the highest, the energy of this lithium rechargeable battery
Metric density and capacity are the biggest.
See Fig. 1, it is shown that the composition hierarchical structure distribution schematic diagram of existing lithium rechargeable battery, this lithium
The composition of ion battery includes successively: glue shell upper cover 1, cell circuit board 2, polymer battery core 3, hot melt
Glue 4 and glue shell lower cover 5.Lithium rechargeable battery take gross space certain in the case of, lithium ion two
Space shared by each building block of the inside of primary cell is also certain, so this polymer battery core institute
The space accounted for also is certain.
Wherein, polymer battery core is mainly by positive pole battery core pole piece, sealing coat, negative pole battery core pole piece and closedtop
31 compositions, and after completing the encapsulation of polymer battery core, this closedtop along the sidewall of polymer battery core near electricity
The direction of pond wiring board extends, so that this closedtop occupies the certain altitude of this polymer battery core, and
This Partial Height can not be utilized, and then reduces the space availability ratio of polymer battery core.By Fig. 1, can
Seeing, the total height of battery is L, and wherein, the total height of polymer battery core is L1, and the height of this closedtop
For L2, this closedtop occupies a part of space of polymer battery core.
Therefore, inventor it has been investigated that, if it is possible to reduce shared by the closedtop in this polymer battery core
Height, then can increase the effective depth of core body of this polymer battery core so that in polymer battery core
Space shared by positive pole battery core pole piece, sealing coat, negative pole battery core pole piece increases, and then increases polymerization
The useful space utilization rate of thing battery core, improves energy density, so improve battery energy density and
Capacity.
In order to realize object above, the invention discloses a kind of lithium rechargeable battery, this lithium ion secondary
Battery at least includes polymer battery core, cell circuit board and battery case, this cell circuit board and electrostrictive polymer
Core is arranged in battery case, and this cell circuit board is arranged on the top of polymer battery core, and and polymer
Battery core is connected.Wherein, this electrostrictive polymer in-core is equipped with positive pole battery core pole piece, negative pole battery core pole piece and sets
It is placed in the isolating membrane between described positive pole battery core pole piece and negative pole battery core pole piece；Outside described polymer battery core
Portion is packaged with encapsulating film, and described encapsulating film includes that side seal and closedtop, described closedtop are arranged at described polymer
Battery core top and be perpendicular to place, described polymer battery core top plane, wherein, described polymer battery core
Top is the one end near described battery circuit board.Unlike the prior art, the top to polymer battery core
The closedtop being packaged can be to place, the top plane bending of this polymer battery core.
In order to be clearly understood from the solution of the present invention, see Fig. 2, it is shown that one lithium ion secondary of the present invention
The composition structural representation of polymer battery core in battery, this polymer battery core 3 internal by positive pole battery core pole piece,
Negative pole battery core pole piece, the isolating membrane being arranged between described positive pole battery core pole piece and negative pole battery core pole piece form,
And the core body outer enclosure of this polymer battery core has encapsulating film, and seal on the core body top of this polymer battery core
Equipped with closedtop 31.
Wherein, isolating membrane plays buffer action, mainly prevents positive pole battery core pole piece and negative pole battery core pole piece
Between contact and cause lithium rechargeable battery content portion short circuit problem.
When completing the encapsulation of polymer battery core, this closedtop 31 along the core body sidewall of polymer battery core to close
The direction of battery circuit board extends, so that this closedtop occupies the certain altitude of this polymer battery core,
As in figure 2 it is shown, this closedtop 31 extends along paper to battery circuit board side.In order to reduce closedtop
Highly, closedtop 31 is designed to be able to place, the top plane bend to described polymer battery core by the present embodiment
Folding.By closedtop 31 to place, the top plane bending of polymer battery core, it is possible to reduce closedtop is along electrostrictive polymer
The length that the sidewall of core is extended to cell circuit board direction, thus reduce the height of closedtop at polymer
Proportion in battery core total height, improves the energy density of polymer battery core.
In fig. 2 this closedtop 31 is embodied in the top bending of polymer battery core: this closedtop is from paper
Bend towards the direction being perpendicular to paper, thus the total length reducing closedtop 31 projection on paper subtracts
Little.
In order to avoid closedtop is during bending, closedtop is damaged, or damage polymer battery core 3
Associated components, in the present embodiment can be by this positive pole battery core pole piece near the setting position of one end of closedtop
On offer some otch, offer on the setting position of one end of closedtop at negative pole battery core pole piece simultaneously
There are some otch.Otch quantity on this positive pole battery core pole piece and the otch quantity phase on negative pole battery core pole piece
With, and during by positive pole battery core pole piece and negative pole battery core pole piece overlap, the otch on positive pole battery core pole piece with
Otch on negative pole battery core pole piece overlaps.See Fig. 3, for opening on the positive pole battery core pole piece of polymer battery core
If the schematic diagram of otch, it is seen then that one end offers several otch on positive pole battery core pole piece.Positive electrical
The quantity of core pole piece upper cut, and the spacing between each otch can be according to electrostrictive polymer to be produced
The sizes of core etc. are set.The mode offering otch on negative pole battery core pole piece and positive pole battery core in Fig. 3
The mode offering otch on pole piece is identical.
Utilize and offer the negative pole battery core pole piece of some otch and offer the positive pole battery core pole piece of some otch
Otch in winding formation polymer battery core, and this positive pole battery core pole piece is cut with described negative pole battery core pole piece
Mouth is overlapped, and this overlapped otch forms corner cut on the top of polymer battery core with sidewall junction
32.This closedtop can along described corner cut 32 to place, the top plane bending of described polymer battery core, i.e. to
Direction bending away from the sidewall place plane of polymer battery core.
Certainly, before winding, it is provided with isolating membrane between this positive pole battery core pole piece and negative pole battery core pole piece.?
The electrostrictive polymer in-core of this formation has electrolyte.
When utilizing the positive pole battery core pole piece with otch and negative pole battery core pole piece coiling polymer battery core, with
The length between two otch on positive pole battery core pole piece (negative pole battery core pole piece) is as polymer battery core
Transverse width, in winding process, each otch is overlapped, defines two in polymer battery core
Corner cut, these two corner cuts lay respectively at the both sides on polymer battery core top so that the drift angle of polymer battery core
Form round and smooth chamfering.Such as Fig. 2, shown in winding after the plane graph of polymer battery core, in this polymerization
Two drift angles of thing battery core are not right angle, but smooth chamfering.
Wherein, the concrete shape of the corner cut in this polymer battery core can set as required, in order to
During avoiding closedtop bending, cause the side seal damaging or damaging polymer battery core of closedtop, permissible
By the circular arc corner cut being configured with certain radius of the corner cut in this polymer battery core, such as institute in Fig. 2
The shape of the corner cut 32 shown.In order to allow corner cut become to have the arc corner cut of certain radius, should arranging
Otch on the positive pole battery core pole piece of polymer battery core and negative pole battery core pole piece, needs to set the shape of this otch
Shape, with the corner cut that formed after needing to ensure each otch overlap as circular arc.
It addition, in actual applications, during polymer battery core is packaged, need to ensure to be somebody's turn to do
The side seal of polymer battery core fits with the corner cut in this polymer battery core so that the electrostrictive polymer after encapsulation
Core still presents corner cut, and can guarantee that the corner cut shape in polymer battery core is front with encapsulation unchanged.So,
After encapsulation terminates, the closedtop of this polymer battery core corner cut in this polymer battery core is bent downwards.
This closedtop bending degree to the top of polymer battery core can also set according to actual needs, in order to
The height shared by this closedtop can be reduced to greatest extent, can be by closedtop to described polymer battery core
Place, top bends, until the plane at described closedtop place is perpendicular to the plane at described side seal place, now
This closedtop place plane is almost parallel with place, the top plane of polymer battery core.As shown in Figure 2, permissible
Closedtop is in same plane from the sidewall with described polymer battery core and is folded into be perpendicular to shown in Fig. 2 poly-
In the plane of the sidewall of compound battery core, in other words, by this closedtop from the position bending of the paper being in Fig. 2
The position of paper it is perpendicular to this closedtop.So, the height shared by this closedtop only with prepare this closedtop
The thickness of material is identical.
When considering to be packaged the sidewall of polymer battery core, side seal needs fully wrapped around firmly this polymer
The sidewall of battery core, so that the width of side seal (represents width, vertical direction with horizontal direction in Fig. 2
Represent length and height) more than the width of this sidewall.Therefore, by closedtop to the top of polymer battery core
During bending, it may be necessary to bend the part beyond sidewall in this side seal, therefore, it can positive pole simultaneously simultaneously
Battery core pole piece and the negative pole battery core pole piece other end offer some otch, i.e. make positive electrical core pole piece and bear
On the battery core pole piece of pole, two ends are provided with otch.Each of this positive pole battery core pole piece and negative pole battery core pole piece is cut
Mouth-shaped is the most identical, and concrete is referred to shown in Fig. 3.So, by positive pole battery core pole piece and negative electricity
Polymer battery core top and low side that core pole piece coiling is formed are respectively provided with corner cut, are polymerized as shown in Figure 3
All there is the corner cut of the circular arc with certain radius the top and bottom of thing battery core.
It addition, the present invention can also use flexible material prepare described closedtop, so, to electrostrictive polymer
After core is packaged, it is also possible to by this closedtop to the top bending of this polymer battery core, until this closedtop hangs down
The straight side seal with described polymer battery core.Certainly, can to the whole encapsulating film of whole polymer battery core encapsulation
Make being flexible material, so use the encapsulating film of this flexible material that polymer battery core is packaged
Time, the closedtop being packaged the top of polymer battery core being formed is for can arbitrarily bend, and to polymer
The side seal that the two side of battery core is packaged being formed can also arbitrarily bend, thus avoids closedtop to leaning on
One lateral buckling on the top of nearly polymer battery core occurs damaging closedtop or the phenomenon of side seal.
On the top of the polymer battery core formed, respectively from described positive pole battery core pole piece and negative pole battery core pole piece
The upper positive pole drawn and negative pole, and described battery circuit board is connected with described positive pole and negative pole.Should
The connected mode of cell circuit board and the positive pole on polymer battery core top and the connected mode of negative pole are with existing
In lithium rechargeable battery, the connected mode of cell circuit board is identical.But the closedtop due to this polymer battery core
Shared height reduces, and the distance between the top plan of this cell circuit board and polymer battery core is obvious
Reduce.
Certainly, the lithium rechargeable battery in the present invention possesses glue shell upper cover, glue shell lower cover too, heat
Building block necessary to the lithium ion batteries such as melten gel layer, the structure of these building blocks and annexation
Similar to the connected mode of existing lithium rechargeable battery.
In order to embody more intuitively the lithium rechargeable battery of invention to have higher ability close
Degree, sees Fig. 4, it is shown that the composition structural representation of the lithium rechargeable battery of the present invention, in the present invention
In the total height of this lithium rechargeable battery be L, the total height of polymer battery core is L1, this electrostrictive polymer
The closedtop of core bends to the sidewall of this polymer battery core, and this closedtop is perpendicular to side seal layer, so that should
Height shared by closedtop is L3, and this height L3 is much smaller than the height shared by closedtop not bent in Fig. 1
Degree L2.Height shared by this closedtop reduces, on the premise of this polymer battery core total height is certain,
Make this polymer battery core is made up of positive pole battery core pole piece, negative pole battery core pole piece, isolating membrane and electrolyte
Polymer battery core the space shared by core body increase, thus increase arrived this polymer battery core space profit
By rate, and then increase energy density and the capacity of this lithium rechargeable battery.
Present disclosure provides in a kind of lithium rechargeable battery, due to the closedtop energy in polymer battery core
Enough place, top plane bendings to polymer battery core, so that polymer shared by the closedtop after Wan Zhe
The height of battery core substantially reduces, and then improves the space availability ratio of polymer battery core, and then improves lithium
The energy density of ion secondary battery and capacity.
It addition, corresponding above lithium rechargeable battery, present invention also offers a kind of making lithium ion two
The method of primary cell, sees Fig. 5, shows a kind of method one making lithium rechargeable battery of the present invention
The schematic flow sheet of embodiment, the method for this enforcement includes:
Step 501: prepare positive pole battery core pole piece and negative pole battery core pole piece.
Before preparing the polymer battery core of lithium ion battery, need to prepare positive pole battery core pole piece and negative pole battery core
Pole piece, prepares the process of positive pole battery core pole piece and negative pole battery core pole piece and existing polymer battery core of preparing
The process of pole piece is similar to.
After selecting positive pole battery core pole piece up to specification and negative pole battery core pole piece, just can carry out follow-up
Prepare polymer battery core, and then make the operation of lithium rechargeable battery.
Step 502: utilize described positive pole battery core pole piece and described negative electrode chip structure polymer battery core
Sidewall, and isolating membrane is set between described positive pole battery core pole piece and described negative pole battery core pole piece.
Described positive pole battery core pole piece and negative pole battery core pole piece is utilized to prepare the core body of polymer battery core, in preparation
During the core body of polymer battery core, isolating membrane is set between positive pole battery core pole piece and negative pole battery core pole piece.
Isolating membrane plays buffer action, mainly prevent from contacting between positive pole battery core pole piece with negative pole battery core pole piece and
The problem causing the short circuit of lithium rechargeable battery content portion.
While utilizing positive pole battery core pole piece and negative pole battery core pole piece to prepare the core body of polymer battery core,
The core body of this polymer battery core also is constructed out, and top and the sidewall of this polymer battery core are also formed, this
Time formed polymer battery core be the polymer battery core not being packaged.
Step 503: the sidewall of described polymer battery core is packaged, obtains the side seal of polymer battery core.
After completing step 502 and step 503, prepared by the key component of polymer battery core
Complete, need afterwards polymer battery core is packaged, the sidewall of this polymer battery core is packaged,
Polymer side walls is formed side seal.After closedtop can be understood as being packaged this polymer battery core,
The encapsulation limit that encapsulating film is formed on the two side of polymer battery core.
Step 504: be packaged forming closedtop to the top of described polymer battery core.
Encapsulation to polymer battery core also includes being packaged the top of polymer battery core, completes polymer
After the encapsulation at top, just obtain closedtop.Closedtop can be understood as sealing this polymer battery core
After dress, the encapsulation limit that encapsulating film is formed on the top of polymer battery core.
This closedtop edge that this step obtains is parallel to the flat away from electrostrictive polymer of the sidewall of polymer battery core
The top of core extends so that this closedtop occupies certain height (being referred to as length), so that
The space availability ratio obtaining polymer battery core reduces.
Step 505: closedtop is bent to place, the top plane of described polymer battery core.
In order to reduce in this polymer battery core the space shared by closedtop, need to reduce this closedtop along sidewall institute
The height (length) that extends to the top of polymer battery core of plane, the present embodiment is preparing closedtop
After, in addition it is also necessary to this closedtop is bent to place, the top plane of polymer battery core, to reduce closedtop institute
The space taken, and then improve the useful space utilization rate of polymer battery core.
This closedtop can be configured as required to the degree of the top bending of polymer battery core, in order to
The space shared by polymer battery core can be reduced to greatest extent, can be by this closedtop to polymer battery core
Top bending, until this closedtop is perpendicular with the sidewall of polymer battery core.
Wherein, in order to avoid by this closedtop to the process of the plane bending at the place, top of polymer battery core
In, damage this closedtop, or damage the side seal of this polymer battery core, can be by this closedtop by flexible material
Material is made.Further, when the encapsulation of the sidewall to polymer battery core, side seal can also be by flexible material
Material is made.
Certainly, when preparing lithium rechargeable battery, in addition it is also necessary to welding cell circuit board, by this battery line
Road plate is welded on this polymer battery core near one end of described closedtop.Concrete, in described polymer battery core
Top on, respectively from described positive pole battery core pole piece and negative pole battery core pole piece draw positive pole and negative pole,
And described battery circuit board is connected with described positive pole and negative pole.
It addition, polymer battery core is additionally provided with hot melt adhesive layer away from one end of described cell circuit board.Should
Polymer battery core, cell circuit board and hot melt adhesive layer may be contained within a battery case, and at the two of battery case
End is respectively provided with glue shell upper cover and glue shell glue shell, thus obtains a complete lithium rechargeable battery.
When being packaged lithium rechargeable battery, the material of closedtop and side seal can also be with existing envelope
Package material is identical, but existing encapsulating material the most not directly bends, in order to realize reducing this polymerization
Space shared by the closedtop of thing battery core, sees Fig. 6, it is shown that one of the present invention makes lithium ion secondary electricity
The schematic flow sheet of another embodiment of method in pond, the present embodiment is that a upper embodiment is more detailed to be retouched
Stating scheme, the method for the present embodiment includes:
Step 601: prepare or provide positive pole battery core pole piece and negative pole battery core pole piece.
Step 602: offer some otch on the setting position of positive pole battery core pole piece one end, in negative pole battery core
Arranging of pole piece is offered on position and the otch of equal number on positive pole battery core pole piece.
In the present embodiment, on positive pole battery core pole piece and on negative pole battery core pole piece, some otch are set, otch
Spacing between quantity and each otch can be set according to actual needs.
Kerf on negative pole battery core pole piece is identical with the kerf on positive pole battery core pole piece, and negative pole
Battery core pole piece is identical with the position offering otch on positive pole battery core pole piece, will positive pole battery core pole piece and negative pole
Battery core pole piece overlaps when stacking, and the otch of the relevant position on positive pole battery core pole piece and negative pole battery core pole piece is also
Overlapped.
Step 603: utilize positive pole battery core pole piece and the negative pole battery core pole piece making polymer with some otch
The core body of battery core, and isolating membrane is set between this positive pole battery core pole piece and negative pole battery core pole piece.Wherein,
The one end offering otch on described positive pole battery core pole piece and negative pole battery core pole piece constitutes the top of polymer battery core
End.The top of this polymer battery core is one end of the cell circuit board in lithium rechargeable battery.
The positive pole battery core pole piece with otch and negative pole battery core pole piece is utilized to make the process tool of polymer battery core
Body is: the otch on described positive pole battery core pole piece and described negative electrode chip is overlapping, and winds described
Positive pole battery core pole piece and described negative pole battery core piece structure polymer battery core, otch overlapping after winding is poly-
In compound battery core, top and sidewall junction form corner cut.
Step 604: be packaged the sidewall of described polymer battery core, obtains side seal, and described side seal with
The position that corner cut on described polymer electric wire coincides fits with corner cut.
Owing to there is otch on positive pole battery core pole piece, during the sidewall of polymer battery core is packaged,
Need to fit with corner cut at the position that side seal and the corner cut in this polymer battery core coincide so that encapsulation
After polymer battery core still maintain former corner cut shape.
Wherein, the shape of this corner cut can set as required, bends closedtop for the ease of follow-up,
This corner cut can be configured with the circular arc corner cut of certain radius.
Step 605: by closedtop along described corner cut to the top bending of described polymer battery core.
Owing to one end of this closedtop close on side seal has corner cut, therefore, it can this closedtop along this corner cut
To the top bending of polymer battery core, thus avoid this closedtop during bending with the collision of side seal, or
Person is the pressure formed due to closedtop and side seal, and causes this closedtop or side seal to damage.
This closedtop can set according to actual needs to the degree of the outer lateral buckling of polymer battery core.Optionally,
In order to reduce the space of the polymer battery core shared by this closedtop to greatest extent, can be by this closedtop
Along described corner cut to the top bending of polymer battery core, until the plane at described closedtop place is perpendicular to polymerization
The plane at the side seal place of thing battery core.It is to say, by closedtop to the top bending of polymer battery core, directly
It is mutually perpendicular to the plane at this closedtop place and the plane at described side seal layer place.
Step 606: cell circuit board is welded on positive pole and negative pole that described polymer battery core top is drawn
On.
Positive pole and the negative pole drawn with polymer battery core top by this cell circuit board weld together, due to
Space shared by this closedtop is reduced, so that this cell circuit board and the place, top of polymer battery core
Distance Shortened between plane.
Step 607: choose a battery case, arranges lower glue cap, arranges heat in housing in one end of housing
Melten gel layer.
Step 608, the polymer battery core that overhead welding is connected to cell circuit board is placed on the PUR of battery case
Layer, and this polymer battery core contacts with described hot melt adhesive layer away from one end of cell circuit board.
Step 609: described battery case opening arranges gluing cap, forms the lithium ion secondary electricity sealed
Pond.
The operating process phase of the step 606 process to step 608 and existing making lithium rechargeable battery
With, existing any-mode can be used to complete this polymer battery core and hot melt adhesive layer and to be arranged on battery
In shell, and close the operation of this battery case.
It addition, utilizing positive pole battery core pole piece and negative pole battery core pole piece to make polymer battery core in the present invention
Before, it is also possible to this negative pole battery core pole piece and positive pole battery core pole piece away from one end of battery circuit board also
Offer some otch, thus utilize two ends all to offer positive pole battery core pole piece and the negative pole battery core of some otch
Pole piece makes the core body of polymer battery core so that the polymer battery core top being wound into and bottom are respectively provided with cuts
Angle, thus the closedtop being more conducive to the polymer battery core after encapsulation bends near top plan.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
For device disclosed in embodiment, owing to it corresponds to the method disclosed in Example, so describing
Fairly simple, relevant part sees method part and illustrates.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (8)
1. a lithium rechargeable battery, including polymer battery core, battery circuit board and battery case, wherein,
Described electrostrictive polymer in-core is equipped with positive pole battery core pole piece, negative pole battery core pole piece and is arranged at described positive electrical
Isolating membrane between core pole piece and negative pole battery core pole piece, described polymer battery core outer enclosure has encapsulating film,
Described encapsulating film includes that side seal and closedtop, described closedtop are arranged at described polymer battery core top, wherein,
The top of described polymer battery core is the one end near described battery circuit board, it is characterised in that described top
Envelope can be to place, the top plane bending of described polymer battery core, and the plane at described closedtop place is vertical
In described side seal place plane；
Wherein, described positive pole battery core pole piece offers some otch near one end of described closedtop；
Described negative pole battery core pole piece offers and phase on described positive pole battery core pole piece near one end of described closedtop
Otch with quantity；
Described positive pole battery core pole piece and described negative pole battery core pole piece coiling form described polymer battery core, and institute
State the otch on positive pole battery core pole piece overlapped with the otch of described negative pole battery core pole piece, described phase mutual respect
Folded otch forms corner cut on the top of polymer battery core with sidewall junction；
Described closedtop can be along described corner cut to place, the top plane bending of described polymer battery core.
Battery the most according to claim 1, it is characterised in that described closedtop is that flexible material is made.
Battery the most according to claim 1, it is characterised in that on the top of described polymer battery core
On, the positive pole drawn from described positive pole battery core pole piece and negative pole battery core pole piece respectively and negative pole, and by institute
State battery circuit board to be connected with described positive pole and negative pole.
Battery the most according to claim 1, it is characterised in that described corner cut is for having certain radius
Circular arc corner cut.
Battery the most according to claim 1, it is characterised in that described electrostrictive polymer in-core also includes:
Electrolyte.
6. the method making lithium rechargeable battery, it is characterised in that including:
Prepare positive pole battery core pole piece and negative pole battery core pole piece；
Utilize described positive pole battery core pole piece and described negative pole battery core piece structure polymer battery core, and described
Between positive pole battery core pole piece and described negative pole battery core pole piece, isolating membrane is set；
The sidewall of described polymer battery core is packaged, obtains side seal；
It is packaged forming closedtop to the top of described polymer battery core；
By described closedtop to place, the top plane bending of described polymer battery core；
Wherein, described positive pole battery core pole piece and the side of described negative pole battery core piece structure polymer battery core are utilized
Before wall, also include: offer some otch in the setting position of described positive pole battery core pole piece；
Offer on position and equal number on described positive pole battery core pole piece arranging of described negative pole battery core pole piece
Otch；
When utilizing the sidewall of described positive pole battery core pole piece and described negative pole battery core piece structure polymer battery core,
Otch on described positive pole battery core pole piece and described negative pole battery core pole piece is overlapping, and wind described positive electrical
Core pole piece and described negative pole battery core piece structure polymer battery core, otch overlapping after winding is at electrostrictive polymer
On core, top and sidewall junction form corner cut；
The described sidewall to described polymer battery core is packaged, and obtains side seal, including:
The sidewall of described polymer battery core is packaged, obtains side seal, and at described side seal with described
The position that corner cut in polymer battery core overlaps fits with described corner cut；
Wherein, by described closedtop along described corner cut to place, the top plane bending of described polymer battery core,
Specifically include:
By described closedtop along described corner cut to place, the top plane bending of described polymer battery core, until institute
The plane stating closedtop place is perpendicular to described side seal place plane.
Method the most according to claim 6, it is characterised in that described corner cut is for having certain radius
Circular arc corner cut.
Method the most according to claim 6, it is characterised in that also include:
On the top of described polymer battery core, respectively from described positive pole battery core pole piece and negative pole battery core pole piece
Upper extraction positive pole and negative pole, and described battery circuit board is connected with described positive pole and negative pole.
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| CN105978104B (en) * | 2016-06-30 | 2019-03-08 | 联想(北京)有限公司 | A kind of battery and electronic equipment |
| US10243243B2 (en) | 2016-06-30 | 2019-03-26 | Lenovo (Beijing) Co., Ltd. | Battery and charging method |
| KR102367387B1 (en) * | 2017-08-29 | 2022-02-24 | 주식회사 엘지에너지솔루션 | Method for Sealing Side Part of Pouch-Type Battery Comprising Two Sealing Steps |
| CN110336070A (en) * | 2019-07-19 | 2019-10-15 | 恒大新能源科技集团有限公司 | A kind of battery matching VDA mould group |
| CN114747070B (en) * | 2020-06-30 | 2024-03-19 | 东莞新能德科技有限公司 | Battery, battery assembly, battery pack and electronic device |
| CN113054237A (en) * | 2021-03-30 | 2021-06-29 | 天津力神电池股份有限公司 | High-energy-density soft package lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201319393Y (en) * | 2008-08-06 | 2009-09-30 | 东莞新能源科技有限公司 | Structure for improving packing capacity of secondary lithium ion battery cell |
| CN101640287A (en) * | 2008-07-31 | 2010-02-03 | 比亚迪股份有限公司 | Soft package lithium ion battery and manufacturing method thereof |
| CN201985201U (en) * | 2011-01-19 | 2011-09-21 | 哈尔滨光宇电源股份有限公司 | Lithium ion power battery pole piece with high safety |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002175785A (en) * | 2000-12-08 | 2002-06-21 | Japan Storage Battery Co Ltd | Cylindrical secondary battery |
| JP5889521B2 (en) * | 2010-07-15 | 2016-03-22 | Ｎｅｃトーキン株式会社 | Electric double layer capacitor and manufacturing method thereof |
-
2012
- 2012-05-22 CN CN201210160904.1A patent/CN103427108B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640287A (en) * | 2008-07-31 | 2010-02-03 | 比亚迪股份有限公司 | Soft package lithium ion battery and manufacturing method thereof |
| CN201319393Y (en) * | 2008-08-06 | 2009-09-30 | 东莞新能源科技有限公司 | Structure for improving packing capacity of secondary lithium ion battery cell |
| CN201985201U (en) * | 2011-01-19 | 2011-09-21 | 哈尔滨光宇电源股份有限公司 | Lithium ion power battery pole piece with high safety |
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