CN104112835B - Secondary cell - Google Patents
Secondary cell Download PDFInfo
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- CN104112835B CN104112835B CN201410153885.9A CN201410153885A CN104112835B CN 104112835 B CN104112835 B CN 104112835B CN 201410153885 A CN201410153885 A CN 201410153885A CN 104112835 B CN104112835 B CN 104112835B
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- Prior art keywords
- barrier film
- limit
- secondary cell
- positive pole
- negative pole
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- 230000004888 barrier function Effects 0.000 claims abstract description 136
- 230000001464 adherent effect Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0463—Cells or batteries with horizontal or inclined electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cell Separators (AREA)
- Secondary Cells (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a kind of secondary cell having when abnormal heating and preventing diaphragm retracts and make gas be difficult to remain in the structure between barrier film simultaneously.This secondary cell, including embedding barrier film core positive pole and negative pole being alternately stacked to form between a positive electrode and a negative electrode, this barrier film has the first limit and is positioned at the second limit of its opposite side.Barrier film, for the barrier film of the most adjacent at least one party, has the engaging zones of intermittent engagement in the way of binding part and non-stick knot are alternatively formed.This engaging zones include by between the first limit intermittent engagement the first engaging zones and by the second engaging zones of the second limit intermittent engagement.
Description
Technical field
The present invention relates to one have and embed barrier film between a positive electrode and a negative electrode and positive pole and negative pole handed over
Secondary cell for the structure of stacking.
Background technology
Battery includes rechargeable nonaqueous electrolytic battery, such as lithium rechargeable battery.This secondary cell
Have and embed barrier film between a positive electrode and a negative electrode and by positive pole and negative pole by multilayer laminated core (core)
(internal structure).Barrier film has and prevents between electrode contact and move lithium ion or electrolyte simultaneously
Function.In order to meet this function, barrier film uses such as the macromolecule resins such as Porous sheet (sheet),
It softens according to temperature conditions, melts.There is the secondary cell of this barrier film by using barrier film
This character suppresses to be attended by the improper charge and discharge that temperature rises.
The short circuit etc. between overcharge or electrode according to secondary cell, when the temperature of secondary cell rises
Time, this barrier film also has and is suitably softened and melts and then make lithium ion to stop at positive pole and negative pole
Between move, so that the discharge and recharge after it becomes impossible function.By this function of barrier film
It is referred to as " cut-out " (shut down).
But, this cutting function also has limitation, plays the temperature of cutting function and secondary if exceeding
The temperature of battery is further up, then can there is barrier film and overbate and melt thus situation about shrinking.
Especially, if there is abnormal heating, then inside heat entrance, first from core, temperature rises.
Although barrier film peripheral dimension compared with plate electrode is slightly larger, if but the middle body of secondary cell
Temperature raises, then produce from middle body and shrink.As a result of which it is, an electrode part is exposed, and then
Contact with each other and be short-circuited.Secondary cell is become this situation and is referred to as " fusing " (melt down).
In order to play cutting function and prevent fusing, just considering to manufacture to enter multiple materials different for fusing point
The barrier film of the multiple structure of row stacking.Such as, as simplest method, patent documentation 1 discloses
A kind of will employ the non-woven fabrics of the materials with high melting point such as polyimides and employ the low melting points such as polypropylene
The barrier film that fine porous both films of material carry out overlap and use.
In this patent documentation 1, disclose a kind of folding by fold by barrier film and formed and from turnover
The secondary cell of electrode slice is inserted in each side.This secondary cell has electrode active on the surface of electrode slice
Property material layer, if due to according to manufacture process various stress electrode active material layers peel off and come off,
Can damage barrier film and then cause the reasons such as short circuit, therefore the joggling part in barrier film turnover is formed and is not coated with electricity
The scope of pole active material layer.
The Stackable batteries that patent documentation 2 is recorded has embedding barrier film between multiple positive poles and negative pole and enters
And alternately laminated layer-built battery body.Now, for the most adjacent every a pair barrier film,
Engaging each other at least partially and then being formed bag-shaped at its circumference.Insert by the barrier film of bag-shaped formation
There is positive pole.Fill in bag-shaped barrier film and the negative pole stacking of positive pole, and then constitute multilayer electrode body.For mutually
For the junction surface of a pair barrier film engaged, it is located along the barrier film in the central part region of stacked direction,
Comparing the barrier film being located along stacked direction both ends, the ratio of joint is less.
But, such as patent documentation 1, in order to suppress the contraction of barrier film and with unlike material by multiple structure shape
The barrier film become, the manufacturing expense of barrier film is high.And it is not easy the barrier film to stepped construction and carries out thermal weld
(welding).
When secondary cell abnormal heating, the situation producing hydrogen can be there is.If the gas produced is excessive
Remain in the inside of secondary cell, make casing deformation or the breakage of secondary cell according to intrinsic pressure meeting.In view of
This, arrange the relief valve being opened when the intrinsic pressure pressure being higher than and setting on shell.But due to this
Gas can not pass through barrier film, folds or continuous welding portion if remaining in the fold of patent documentation 1 such as
Inner side, then gas is difficult to the outside discharge to barrier film, therefore become make secondary cell casing deformation it
Reason.
For the Stackable batteries of patent documentation 2, the most adjacent every a pair barrier film is pressed
Bag-shaped joint, and this junction surface is in the stacking direction at lower layer part and the ratio of upper layer part change binding part.
Patent documentation 2 is it is considered that the diffusibility (liquid return) of battery electrolyte inside, i.e. electrolyte homogenizing
It is impregnated with the central part to battery lead plate, and does not consider the gas build between contraction or the barrier film of barrier film.
[prior art literature]
[patent documentation]
Japanese Patent Publication 2012-114075 publication
Japanese Patent Publication 2012-69378 publication
Summary of the invention
Have when abnormal heating can prevent diaphragm retracts and simultaneously in consideration of it, the invention provides one
Gas is made to be difficult to the secondary cell of the structure being accumulated between barrier film.
The secondary cell of one embodiment of the present invention, including embedding barrier film between a positive electrode and a negative electrode
And the core that positive pole and negative pole be alternately stacked to form, described barrier film has the first limit and is positioned at it
Second limit of opposite side, at each layer of described core, described barrier film for the most adjacent at least
The barrier film of one end, has the bonding land of intermittent engagement in the way of binding part and non-stick knot are alternatively formed
Territory, described engaging zones include by between described first limit intermittent engagement the first engaging zones and by
Second engaging zones of intermittent engagement between described second limit.
Now, described barrier film is for a side side barrier film adjacent in a side side in the stacking direction, described
First engaging zones engages, for opposition side barrier film adjacent in opposition side in the stacking direction, in institute
State the second engaging zones to engage.
Further, described secondary cell farther includes to accommodate the container of described core, and is arranged on institute
The periphery wall stating container and the relief valve being opened when exceeding setting intrinsic pressure, be arranged on and described peace
Binding part in the scope that full valve is relative is along described positive pole and the direction of the periphery of described negative pole, little
Described binding part outside being set in described scope, is arranged in the scope relative with described relief valve
Non-stick knot, along described positive pole and the direction of the periphery of described negative pole, more than being set in described model
Described non-stick knot outside enclosing.
Further, described binding part has width in the direction away from described positive pole and the periphery of described negative pole
Degree, and the bonding of the inner circumferential side of described barrier film on the direction along described positive pole and the periphery of described negative pole
Length is less than the bond length of the outer circumferential side of described barrier film.
Further, described binding part is more than described non-stick knot at the bond length of the outer circumferential side of described barrier film
Non-adherent length at the outer circumferential side of described barrier film.
Described positive pole and described negative pole include staggered with described first limit or described second limit and compare institute
State positive pole current-collecting terminals and negative pole current-collecting terminals that the periphery of barrier film extends more laterally.
Now, described positive pole current-collecting terminals and described negative pole current-collecting terminals the most at least connect described in traversing
Close the scope in region, including being formed with the joint portion in the most through multiple holes, described barrier film
For the most adjacent barrier film, by described positive pole current-collecting terminals and described negative pole current-collecting terminals
Described joint portion engage.
The secondary cell of an embodiment according to the present invention, insert between a positive electrode and a negative electrode every
Film has the first limit and is positioned at the second limit of its opposite side, and for the most adjacent at least side
Barrier film, in the way of binding part and non-stick knot are alternatively formed, have disconnected in each layer of core
The engaging zones that continued access is closed, this engaging zones includes the first engaging zones and the engaged between the first limit
The second engaging zones engaged between two limits, therefore can suppress diaphragm retracts and simultaneously can easily by
The gas that electrode surface produces is discharged to the outside of core from non-stick knot.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of the secondary cell of first embodiment of the present invention.
Fig. 2 is the sectional view of the core blocking Fig. 1 in the stacking direction.
Fig. 3 is the diagram that the section of the F3-F3 line along Fig. 2 i.e. illustrates the engaging zones of barrier film.
Fig. 4 is cuing open of the core of the secondary cell of the second embodiment blocking the present invention in the stacking direction
View.
Fig. 5 is the diagram that the section of the F5-F5 line along Fig. 4 i.e. illustrates the engaging zones of barrier film.
Fig. 6 is the core of the secondary cell of the 3rd embodiment illustrating and observing the present invention in the stacking direction
Time barrier film the diagram of engaging zones.
Fig. 7 is the core of the secondary cell of the 4th embodiment illustrating and observing the present invention in the stacking direction
Time barrier film the diagram of engaging zones.
Fig. 8 is the core of the secondary cell of the 5th embodiment illustrating and observing the present invention in the stacking direction
Time barrier film the diagram of engaging zones.
Fig. 9 is cuing open of the core of the secondary cell of the 6th embodiment blocking the present invention in the stacking direction
View.
Figure 10 is the diagram that the section of the F10-F10 line along Fig. 9 i.e. illustrates the engaging zones of barrier film.
Figure 11 is the diagram of the joint portion amplifying Figure 10.
[description of reference numerals]
1: secondary cell
2: container
21: relief valve
10: core
11: barrier film
111: the first limits
112: the second limits
12: positive pole
121: positive pole current-collecting terminals
123: positive wire portion
13: negative pole
131: negative pole current-collecting terminals
133: negative wire portion
124,134: joint portion
K: engaging zones
K1: the first engaging zones
K2: the second engaging zones
Detailed description of the invention
For the secondary cell 1 of first embodiment of the present invention, illustrate referring to figs. 1 to Fig. 3.
Secondary cell 1 shown in Fig. 1 includes the square container 2 of both ends open；Seal each peristome
Electrode cap 3；And the core (duplexer) 10 being contained in container 2.Container can be metal system
Tank (can) container, it is also possible to be the bag-like container formed by laminated film (laminated film).
Container 2 as shown in Figure 1, has relief valve 21 on periphery wall.If this relief valve 21 exceedes pre-
First set is intrinsic pressure, opens, thus prevents container 2 impaired.
Barrier film 11 is embedded and by positive pole 12 and negative pole 13 alternating layer between positive pole 12 and negative pole 13
Fold and form core 10.Fig. 1 illustrates expansion positive pole 12, negative pole 13 and the state of barrier film 11.
Although the core 10 shown in Fig. 1 is the structure that the positive pole 12 of each 5 and negative pole 13 carry out stacking,
But the lamination sheets number of electrode is not limited thereto.As shown in Figures 2 and 3, positive pole 12 is formed as phase
A circle less than the overall dimensions of negative pole 13.Barrier film 11 is formed larger than the overall dimensions of negative pole 13.
This barrier film 11 includes the first limit 111 and is positioned at the second limit 112 of its opposite side.
As in figure 2 it is shown, the positive pole current-collecting terminals 121 that positive pole 12 such as manufactures at dimetric foil-like aluminum
Both sides face on be formed with the positive pole material 122 formed by positive active material.As in figure 2 it is shown, it is negative
Pole 13 be formed on the face of the both sides of the negative pole current-collecting terminals 131 of dimetric foil-like copper production by
The negative pole material 132 that negative electrode active material is formed.Further, positive pole 12 includes comparing by positive pole material 122
The positive wire portion 123 that the scope formed is extended by a part for positive pole current-collecting terminals 121 laterally.
Negative pole 13 includes comparing the scope formed by negative pole material 132 laterally by negative pole current-collecting terminals 131
The negative wire portion 133 that a part extends.Positive wire portion 123 compare with negative wire portion 133 every
The outer outer circumferential of film 11 extends.
In this embodiment, as shown in Figure 1 to Figure 3, the positive wire portion 123 of positive pole 12 is
A part for the positive pole current-collecting terminals 121 traversing the first limit 111 of barrier film 11 and extend, at each figure
In extend downwards.The negative wire portion 133 of negative pole 13 is the opposite side traversing and being positioned at the first limit 111
The second limit 112 of barrier film 11 and the part of negative pole current-collecting terminals 131 that extends, in the various figures
Extend upward.That is, the negative wire portion 133 of the positive wire portion 123 of positive pole 12 and negative pole 13
Extend by the most contrary direction.
Barrier film 11 is for the barrier film 11 of the most adjacent at least one end, with binding part M with non-
The mode that binding part S is alternatively formed, each layer at core 10 has the engaging zones K of intermittent engagement.
This engaging zones K includes the first engaging zones K1 and second of intermittent engagement between the first limit 111
Second engaging zones K2 of intermittent engagement between limit 112.In this embodiment, as in figure 2 it is shown,
The side that at least edge and positive wire portion 123 extend is that is second limit 112, limit that opposition side is formed,
Make binding part M and non-stick knot S alternately arranged to form the second engaging zones K2 of intermittent engagement,
It is that is first limit 111, limit that opposition side is formed along the side with negative wire portion 133 extension, makes to glue
Knot M is alternately arranged with non-stick knot S to form the first engaging zones K1 of intermittent engagement.
Further, binding part M be supply barrier film 11 can be made to melt so that engages sufficient hot same
Time and be not accompanied by local thermal contraction in the case of engage.Therefore, except conventional heater
Beyond thermal weld, it is possible to weld according to laser beam or ultrasound wave.And enter also dependent on binding agent etc.
Row engages.In this manual, will carry out engaging referred to as " welding " with heat fusing.Also can be by material
Fuse itself carries out engaging referred to as " fusion ".
When observing a barrier film 11, barrier film 11 is adjacent for the most at one end side
End side barrier film, engages at the first engaging zones K1, and for adjacent in opposition side in the stacking direction
Opposition side barrier film, second engaging zones K2 engage.In other words, when barrier film 11 is along positive pole 12
With a limit in four limits of the periphery of negative pole 13, adjacent with the most at one end side every
During film 11 intermittent engagement, engaged opposite side, with adjacent in opposition side in the stacking direction
Barrier film 11 intermittent engagement.In this embodiment, as in figure 2 it is shown, negative wire portion 133 is horizontal
The barrier film 11 of that is first limit 111, the opposition side of the side passed through intermittent engagement, its first limit engaged
The opposite side of 111 that is second limit 112 and barrier film 11 intermittent engagement adjacent in opposition side in the stacking direction.
The barrier film 11 engaged with the barrier film 11 of high order end in Fig. 2 in the first limit 111, i.e. from a left side in Fig. 2
Second barrier film 11 is played in side, is positioned at phase in the stacking direction with relative to the barrier film 11 of the leftmost side in Fig. 2
The barrier film 11 tossed about, i.e. in Fig. 2, from left side, the 3rd barrier film 11 engages.So, one every
Film 11, from the different barrier films that the barrier film 11 of the most at one end side engagement is positioned at opposition side in the stacking direction
11, engage in the position becoming opposite side.
In this embodiment, as it is shown on figure 3, straight relative to the first limit 111 and the second limit 112
The engaging zones K of intermittent engagement it is also formed with on the 3rd limit 113 handed over and opposite side that is the 4th limit 114 thereof.
And in each limit, binding part M i.e. traverses respectively along the direction away from positive pole 12 and the periphery of negative pole 13
The direction on limit has width.
For secondary cell configured as described above, the part of interface membrane 11 in the stacking direction,
Have and be alternately arranged along the limit of positive pole 12 and the periphery of negative pole 13 with binding part M and non-stick knot S
The engaging zones K of mode intermittent engagement.And this engaging zones K at least includes being bonded with each other along stacking
The first engaging zones K1 on the first limit 111 of the barrier film 11 that direction is adjacent and being bonded with each other along stacking
The second engaging zones K2 on the second limit 112 of the barrier film 11 that direction is adjacent.Accordingly, because abnormal mistake
Heat and the excessive temperature of secondary cell 1 when uprising, can suppress barrier film 11 according to this heat with positive pole 12 He
The plane of negative pole 13 and shrink.
For the secondary cell 1 of the first embodiment, positive pole current-collecting terminals 121 and the first limit 111
Interlock and extend more laterally than the periphery of barrier film 11, negative pole current-collecting terminals 131 and the second limit 112
Interlock and extend more laterally than the periphery of barrier film 11.First limit 111 is formed the first joint
Region K1, forms the second engaging zones K2 on the second limit 112.That is, barrier film 11 can effectively be suppressed
Shrink along the direction that a part i.e. contact conductor of each current-collecting terminals is extended, and then electrode can be prevented
Between contact.
Owing to binding part M discontinuously configures, even if therefore shrinking when barrier film 11 and then with binding part M be
When starting point is split, owing to this binding part M only a fraction is split, therefore can suppress to split on a large scale
Open.
Further, even if producing gas, due to this secondary from positive pole 12 and the negative pole 13 of secondary cell 1
The barrier film 11 of battery 1 and adjacent barrier film 11 intermittent engagement, the gas therefore produced passes through non-adherent
Portion S can easily be expelled to the outside of core 10.The position being discharged to from producing due to gas is nearest
Peripheral part, therefore can suppress the deformation of secondary cell 1.
Hereinafter, for the secondary cell 1 of second to the 6th embodiment of the present invention, attached in conjunction with each
Figure illustrates.For having the structure of secondary cell 1 identical function with the first embodiment, make
With identical symbol and the most also give identical symbol simultaneously, and describe part in detail
Corresponding according to the first embodiment is recorded and needs to refer to accompanying drawing.
Secondary cell 1 for the second embodiment according to the present invention is said with reference to Fig. 4 and Fig. 5
Bright.This secondary cell 1 is with at least one limit in four limits along positive pole 12 and the periphery of negative pole 13
The mode that binding part M is alternatively formed with non-stick knot S, for the most adjacent barrier film 11
Carry out intermittent engagement.In the second embodiment, when a barrier film 11 is observed, at positive pole
12 and negative pole 13 periphery four limits in a limit on the barrier film 11 of intermittent engagement, engaged
A limit opposite side on the most adjacent barrier film phase intermittent engagement.
The situation of this second embodiment, as shown in Figure 4, the barrier film 11 engaged on the first limit 111,
On the second limit 112 be positioned at its opposite side also with identical barrier film 11 intermittent engagement.That is, embedding is negative
Pole 13 and the most adjacent barrier film 11 that i.e. embedded in negative pole 13 in centre are each other first
Intermittent engagement on limit 111 and the second limit 112.The second limit is traversed in the negative wire portion 133 of negative pole 13
The part of 112 can not be welded.Therefore, by the binding part M's that configures against negative wire portion 133
Bonding area becomes big, to guarantee the bond strength needed.
And identical with the first embodiment, also formed in the 3rd limit 113 and the 4th limit 114 with around
The mode of negative pole 13 is discontinuously provided with bonded areas K of binding part M.In order to maintain positive pole 12 He
The relative position of negative pole 13, it is possible to discontinuously connect by the 3rd limit 113 and opposite side that is the 4th limit 114 thereof
Close and embed positive pole 12 and the most adjacent barrier film 11 that i.e. embedded in positive pole 12 in centre.
The secondary cell 1 of the second embodiment configured as described above, due to barrier film 11 respectively first
Negative pole 13 is embedded in centre and engages by side, limit 111 and the second side, limit 112, therefore can be according to negative
Pole 13 prevents from causing barrier film 11 to shrink because the temperature of abnormal overheated secondary cell 1 uprises.Even and if
By barrier film 11 around positive pole 12 and negative pole 13 around generation gas, owing to barrier film 11 is interrupted
Engaging, therefore gas can be discharged to the outside of core by non-stick knot S.
For the secondary cell 1 of the 3rd embodiment according to the present invention, illustrate with reference to Fig. 6.
For the core 10 of the secondary cell 1 shown in Fig. 6 so that be positioned at be arranged on container 2 it
The binding part MA of the barrier film 11 in the scope that relief valve 21 on periphery wall is relative, less than along just
Binding part M beyond this scope on the direction of the periphery of pole 12 and negative pole 13.And make to be arranged on
Non-stick knot SA in the scope that relief valve 21 is relative, more than outside positive pole 12 and negative pole 13
Non-stick knot S beyond this scope on the direction in week.I.e. so that the scope relative with relief valve 21
The disposition interval of binding part MA become big.
Along the direction of the neighboring of barrier film 11, respectively the length of general binding part M is defined as
ML1, is defined as ML2 by the length of the binding part MA of the scope relative with relief valve 21, by one
As the length of non-stick knot S be defined as SL1, by the non-adherent of the scope relative with relief valve 21
When the length of portion SA is defined as SL2, ML1>ML2, SL1<SL2.Preferably so that non-stick
Length SL2 of the knot SA length more than the binding part MA of the scope relative with relief valve 21
ML2, i.e. ML2 < SL2.
As it has been described above, length ML2 of the binding part MA by making the scope relative with relief valve 21
Shorten and make length SL2 of non-stick knot SA elongated, increasing aperture opening ratio.Glue in order to ensure each
The bond strength of knot M, it is possible to do not change the size of binding part M and the most only only expand disposition interval
Non-stick knot SA is made to become big.
By expanding non-stick knot SA of the scope relative with relief valve 21, the inside of core can be made to produce
Raw gas is easily discharged to relief valve 21 side.By energetically by produce gas to relief valve
21 sides release, and barrier film 11 can be prevented impaired.
For the secondary cell 1 of the 4th embodiment related to the present invention, illustrate with reference to Fig. 7.
For the core 10 of the secondary cell 1 shown in Fig. 7, it is arranged on the 3rd limit 113 of barrier film 11
And the binding part M on opposite side that is the 4th limit 114, in the periphery away from positive pole 12 and negative pole 13
Direction has width.And the weld length ML3 of the inner circumferential side of binding part M is formed as along positive pole 12
With the weld length ML4 that the direction of the periphery of negative pole 13 is less than outer circumferential side.I.e. with the length of inner circumferential side
Trapezoidal formation binding part M less than outer circumferential side length.In other words, the length of the inner circumferential side of non-stick knot S
Degree SL3 is more than length SL4 of outer circumferential side.
By being thusly-formed binding part M and non-stick knot S, the gas energy that the inside of core 10 produces
More easily released to outside by non-stick knot S, and also can suppress to be mixed into core 10 during fabrication
With the fine material such as the sheet metal between container 2 enters into the inside of core 10.Therefore, if boning
The weld length ML4 of the outer circumferential side of portion M is more than length SL4 of the outer circumferential side of non-stick knot S the most more
Good.
For the secondary cell 1 of the 5th embodiment related to the present invention, illustrate with reference to Fig. 8.
For the core 10 of the secondary cell 1 shown in Fig. 8, binding part M is shaped differently than the 4th
Embodiment.The weld length ML3 of the inner circumferential side of the binding part M of the 5th embodiment is almost nil,
Therefore the triangle being shaped as there is summit as shown in Figure 8 in inner circumferential side of binding part M.By such as
This forms binding part M, the gas that the inside of core 10 produces when to the flows outside of core 10,
Owing to not hindered by binding part M, therefore discharge and become easy.
For the secondary cell 1 of the 6th embodiment related to the present invention, with reference to Fig. 9 and Figure 10
Illustrate.In the core 10 of the secondary cell 1 shown in Fig. 9 and Figure 10, barrier film 11 for
At the two ends of the first side, limit 111 and the second side, limit 112 along the adjacent barrier film 11 of the stacked direction of electrode,
Along the first limit 111 and direction intermittent engagement on the second limit 112.Now, in order to improve positive pole current collection end
Bond strength between the barrier film 11 of the scope that son 121 and negative pole current-collecting terminals 131 are traversed, positive pole
Current-collecting terminals 121 and negative pole current-collecting terminals 131 are at least traversing the neighboring that is formed at barrier film 11
The scope of engaging zones K, now traverses the first engaging zones K1 and the second engaging zones K2
Scope, forms the joint portion 124,134 being made up of the most through multiple holes.Such as Figure 11
Shown in, joint portion 124,134 such as so-called perforated plate, multiple circular hole can be got through, it is possible to configuration with
The peristome of the bonding area formed objects of binding part M.
Positive pole current-collecting terminals 121 and negative pole current-collecting terminals 131 have joint portion 124,134, thus can
Embed positive pole current-collecting terminals 121 and negative pole current-collecting terminals 131 in centre in the stacking direction and weld barrier film
11.Welding barrier film 11 by joint portion 124,134, thus barrier film 11 is fixed to positive pole current collection end
Son 121 and negative pole current-collecting terminals 131.Now, barrier film 11 is in the first limit 111 and positive pole current-collecting terminals
121 fix, and fix with negative pole current-collecting terminals 131 on the second limit 112.That is, due to the one of barrier film 11
Opposite side is fixed, barrier film 11 therefore can be suppressed to shrink because of heat.
Further, according to the secondary cell 1 of this embodiment, it is pointed to positive pole current-collecting terminals 121 contrary
Between second limit 112 of the barrier film 11 of side, and it is pointed to negative pole current-collecting terminals 131 opposition side
While engaging respectively between first limit 111 of barrier film 11, can overlapping positive pole in the stacking direction
The joint portion 124,134 of current-collecting terminals 121 and negative pole current-collecting terminals 131 and weld.That is,
After embedding barrier film 11 and stacking positive pole 12 and negative pole 13 between positive pole 12 and negative pole 13
Can weld in the lump, therefore can improve productivity and the productivity of secondary cell 1 of core 10.
Further, the as above first to the 6th embodiment can independent assortment and implement.Such as, as
3rd embodiment changes the binding part M of the scope relative with relief valve 21 and non-stick knot S
The shape etc. changing binding part M in size or such as the 4th and the 5th embodiment also can be suitably used for other
Embodiment.
Claims (6)
1. a secondary cell, including embedding barrier film between a positive electrode and a negative electrode and positive pole and negative pole being handed over
The core formed for stacking, described barrier film has the first limit and is positioned at the second of its opposite side
Limit,
At each layer of described core, described barrier film is for the most adjacent at least one end
Barrier film, there is the joint of intermittent engagement in the way of binding part and non-stick knot are alternatively formed
Region,
Described engaging zones includes by the first engaging zones of intermittent engagement between described first limit
And by the second engaging zones of intermittent engagement between described second limit,
Described secondary cell farther includes to accommodate the container of described core, and is arranged on institute
The periphery wall stating container and the relief valve being opened when exceeding setting intrinsic pressure,
Be arranged on the binding part in the scope relative with described relief valve, along described positive pole and
The direction of the periphery of described negative pole, less than the described binding part being set in outside described scope,
The non-stick knot being arranged in the scope relative with described relief valve, along described positive pole
With the direction of the periphery of described negative pole, more than the described non-adherent being set in outside described scope
Portion.
2. secondary cell as claimed in claim 1, it is characterised in that described barrier film is for along stacking side
The end side barrier film adjacent at one end side, engages at described first engaging zones, for
Opposition side barrier film adjacent in opposition side in the stacking direction, connects at described second engaging zones
Close.
3. secondary cell as claimed in claim 1, it is characterised in that described binding part is away from described
The direction of the periphery of positive pole and described negative pole has a width, and along described positive pole and described negative
On the direction of the periphery of pole, the bond length of the inner circumferential side of described barrier film is less than outside described barrier film
The bond length of all sides.
4. secondary cell as claimed in claim 3, it is characterised in that described binding part is at described barrier film
The bond length of outer circumferential side more than described non-stick knot in the non-stick of the outer circumferential side of described barrier film
Knot length.
5. secondary cell as claimed in claim 1, it is characterised in that described positive pole and described negative pole bag
Include staggered with described first limit or described second limit and than described barrier film periphery more laterally
The positive pole current-collecting terminals extended and negative pole current-collecting terminals.
6. secondary cell as claimed in claim 5, it is characterised in that described positive pole current-collecting terminals and institute
State negative pole current-collecting terminals and the most at least traverse the scope of described engaging zones, including being formed with
The joint portion in the most through multiple holes,
Described barrier film is for the most adjacent barrier film, by described positive pole current-collecting terminals
Engage with the described joint portion of described negative pole current-collecting terminals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013086631A JP6163847B2 (en) | 2013-04-17 | 2013-04-17 | Secondary battery |
| JP2013-086631 | 2013-04-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104112835A CN104112835A (en) | 2014-10-22 |
| CN104112835B true CN104112835B (en) | 2016-08-31 |
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| CN201410153885.9A Expired - Fee Related CN104112835B (en) | 2013-04-17 | 2014-04-16 | Secondary cell |
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|---|---|
| JP (1) | JP6163847B2 (en) |
| KR (1) | KR101589811B1 (en) |
| CN (1) | CN104112835B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104577004B (en) * | 2014-12-25 | 2017-01-04 | 山东精工电子科技有限公司 | A kind of polymer Li-ion battery of fixing barrier film and preparation method thereof |
| WO2019012825A1 (en) * | 2017-07-14 | 2019-01-17 | 日本電気株式会社 | Bag-shaped separator for electric storage device, thermal bonding method and thermal bonding device therefor, and electric storage device |
| DE102017216101A1 (en) * | 2017-09-12 | 2019-03-14 | Robert Bosch Gmbh | Method for producing an electrode arrangement, electrode arrangement and battery cell comprising at least one electrode arrangement |
| JP7201482B2 (en) * | 2019-03-04 | 2023-01-10 | 積水化学工業株式会社 | Storage element and method for manufacturing storage element |
| DE102019216043A1 (en) * | 2019-10-17 | 2021-04-22 | Volkswagen Aktiengesellschaft | Process for the production of an energy cell as well as an energy cell |
| KR20210047208A (en) * | 2019-10-21 | 2021-04-29 | 주식회사 엘지화학 | Electrode assembly manufacturing method, electrode assembly manufactured from thereof |
| CN116261794A (en) | 2020-11-18 | 2023-06-13 | 株式会社Lg新能源 | Secondary battery and method for manufacturing same |
| WO2022250307A1 (en) * | 2021-05-24 | 2022-12-01 | 주식회사 엘지에너지솔루션 | Unit cell and battery cell comprising same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171703A (en) * | 2005-05-10 | 2008-04-30 | 松下电器产业株式会社 | Battery |
| CN101626094A (en) * | 2008-07-11 | 2010-01-13 | 东莞新能源科技有限公司 | Lithium-ion battery and battery core thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3511443B2 (en) * | 1996-12-20 | 2004-03-29 | 株式会社リコー | Battery device |
| JP3422284B2 (en) * | 1999-04-30 | 2003-06-30 | 新神戸電機株式会社 | Prismatic nonaqueous electrolyte secondary battery |
| JP2003092100A (en) * | 2001-09-19 | 2003-03-28 | Nec Corp | Laminated cell |
| JP5456542B2 (en) * | 2010-04-01 | 2014-04-02 | 日立ビークルエナジー株式会社 | Rectangular secondary battery and method for manufacturing prismatic secondary battery |
| JP2012069378A (en) * | 2010-09-24 | 2012-04-05 | Sanyo Electric Co Ltd | Stacked cell |
| JP5147976B2 (en) | 2010-11-01 | 2013-02-20 | 帝人株式会社 | Connected porous sheet and method for producing the same, separator for non-aqueous secondary battery, non-aqueous secondary battery and method for producing the same |
| JP5701688B2 (en) * | 2011-01-31 | 2015-04-15 | 三洋電機株式会社 | Multilayer battery and method for manufacturing the same |
| JP6089399B2 (en) * | 2011-04-07 | 2017-03-08 | 日産自動車株式会社 | Battery and battery manufacturing method |
| JP2013196837A (en) * | 2012-03-16 | 2013-09-30 | Tdk Corp | Nonaqueous secondary battery |
-
2013
- 2013-04-17 JP JP2013086631A patent/JP6163847B2/en not_active Expired - Fee Related
-
2014
- 2014-04-15 KR KR1020140044819A patent/KR101589811B1/en active IP Right Grant
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171703A (en) * | 2005-05-10 | 2008-04-30 | 松下电器产业株式会社 | Battery |
| CN101626094A (en) * | 2008-07-11 | 2010-01-13 | 东莞新能源科技有限公司 | Lithium-ion battery and battery core thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101589811B1 (en) | 2016-01-28 |
| JP6163847B2 (en) | 2017-07-19 |
| JP2014211974A (en) | 2014-11-13 |
| CN104112835A (en) | 2014-10-22 |
| KR20140125305A (en) | 2014-10-28 |
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