CN104112835A - Rechargeable battery - Google Patents
Rechargeable battery Download PDFInfo
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- CN104112835A CN104112835A CN201410153885.9A CN201410153885A CN104112835A CN 104112835 A CN104112835 A CN 104112835A CN 201410153885 A CN201410153885 A CN 201410153885A CN 104112835 A CN104112835 A CN 104112835A
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- China
- Prior art keywords
- barrier film
- negative pole
- binding part
- secondary cell
- along
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Links
- 230000004888 barrier function Effects 0.000 claims description 138
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000010030 laminating Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 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
- 239000004411 aluminium 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
- 230000036760 body temperature Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007599 discharging Methods 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
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 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
- 239000000155 melt 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
- 230000000630 rising effect Effects 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
Abstract
The invention provides a rechargeable battery with a structure capable of preventing shrinkage of diaphragms and preventing gas from staying between the diaphragms in case of exceptional heat. The rechargeable battery comprises a core which is formed by embedding the diaphragms between positive electrodes and negative electrodes and laminating the positive electrodes and the negative electrodes alternately. Each diaphragm comprises a first side and a second side opposite to the first side. Relative to at least one adjacent diaphragms in the laminating direction, the diaphragms comprise joining areas interruptedly joined and formed by arranging bonding portions and non-bonding portions alternately. The joining areas include first joining areas interruptedly joined at the first side and second joining areas interruptedly joined at the second side.
Description
Technical field
The present invention relates to a kind of have between positive pole and negative pole, embed barrier film and by the secondary cell anodal and structure that negative pole is alternately laminated.
Background technology
Battery comprises rechargeable nonaqueous electrolytic battery, for example lithium rechargeable battery.This secondary cell have between positive pole and negative pole, embed barrier film and by anodal and negative pole by multilayer laminated core (core) (internal structure).Barrier film has the contact of preventing between electrode and the function of mobile lithium ion or electrolyte simultaneously.In order to meet this function, barrier film is used as macromolecule resins such as Porous sheets (sheet), and it softens, melts according to temperature conditions.The secondary cell with this barrier film suppresses to be attended by by this character with barrier film the improper charge and discharge that temperature rises.
According to secondary cell overcharge or electrode between short circuit etc., when the temperature of secondary cell rises, this barrier film also has to be suitably softened and to melt and then lithium ion is stopped between positive pole and negative pole and moves, thereby makes discharging and recharging after it become impossible function.This function of barrier film is called to " cut-out " (shut down).
Yet this cutting function also has limitation, if surpass the temperature of performance cutting function, the temperature of secondary cell further rises, thereby can exist barrier film to overbate and melt the situation of contraction.Especially, if there is abnormal heating, heat enters inside and first temperature rising from core.Although barrier film is compared peripheral dimension with plate electrode larger a little, if the middle body temperature of secondary cell raises, from middle body, produce and shrink.Consequently, an electrode part is exposed, and then contacts with each other and be short-circuited.Secondary cell is become to this situation and be called " fusing " (melt down).
In order to bring into play cutting function and to prevent fusing, just considering to manufacture the barrier film that the different a plurality of materials of fusing point is carried out to stacked sandwich construction.For example, as the simplest method, patent documentation 1 has disclosed a kind of nonwoven fabrics of the materials with high melting point such as polyimides and fine porous film that has used the low melting materials such as polypropylene of having used and has carried out barrier film overlapping and use.
In this patent documentation 1, disclosed a kind of that barrier film is folding and form and from the secondary cell of each side electrode insertion sheet of turnover by fold.This secondary cell has electrode active material layer on the surface of electrode slice, if owing to peeling off and coming off according to the various stress electrode active material layers of manufacture process, can damage barrier film and then cause the reasons such as short circuit, therefore the joggling part in barrier film turnover forms the not scope of coating electrode active material layer.
The Stackable batteries that patent documentation 2 is recorded has and between a plurality of positive poles and negative pole, embeds barrier film and then alternately laminated layer-built battery body.Now, for for the adjacent every a pair of barrier film of stacked direction, at least a portion of its circumference, engage one another and then form bag-shaped.Barrier film by bag-shaped formation is inserted with positive pole.Fill in anodal bag-shaped barrier film and negative pole stacked, and then form stacked electrode body.For the junction surface of a pair of barrier film engaging one another, be positioned at along the barrier film in the central portion region of stacked direction, compare the barrier film being positioned at along stacked direction both ends, the ratio of joint is less.
But, as patent documentation 1, the barrier film forming by sandwich construction with unlike material in order to suppress the contraction of barrier film, the manufacturing expense of barrier film is high.And be not easy the barrier film of stepped construction to carry out thermal weld (welding).
When secondary cell abnormal heating, can there is the situation that produces hydrogen.If the gas producing excessively remains in the inside of secondary cell, according to interior pressure, can make casing deformation or the breakage of secondary cell.Given this, the safety valve of being opened during higher than the pressure of setting when interior pressure is set on shell.But because this gas can not pass through barrier film, if remain in inner side as folding in the fold of patent documentation 1 or continuous welding part, gas is difficult to discharge to the outside of barrier film, therefore becomes the reason of the casing deformation that makes secondary cell.
For the Stackable batteries of patent documentation 2, along the every a pair of barrier film that stacked direction is adjacent, press bag-shaped joint, and this junction surface changes the ratio of binding part in lower layer part and upper layer part along stacked direction.What patent documentation 2 was considered is the diffusivity (liquid returns) of battery electrolyte inside, and electrolyte homogeneous soaks into the central portion to battery lead plate, and does not consider the contraction of barrier film or the gas build between barrier film.
[prior art document]
[patent documentation]
Japanese Patent Publication 2012-114075 communique
Japanese Patent Publication 2012-69378 communique
Summary of the invention
Given this, the invention provides a kind of have when abnormal heating, can prevent that barrier film from shrinking and making gas be difficult to be accumulated in the secondary cell of the structure between barrier film simultaneously.
The secondary cell of an example of the present invention, be included in and between positive pole and negative pole, embed barrier film and by anodal and negative pole is alternately laminated and the core of formation, the Second Edge that described barrier film has first side and is positioned at its opposite side, each layer at described core, described barrier film is for the barrier film along the adjacent at least one end of stacked direction, the engaging zones with the mode intermittent engagement alternately forming with binding part and non-binding part, described engaging zones comprises by the first engaging zones of intermittent engagement between described first side and by the second engaging zones of intermittent engagement between described Second Edge.
Now, described barrier film for along stacked direction at the adjacent side's side barrier film of side's side, at described the first engaging zones, engage, for along stacked direction at the adjacent opposition side barrier film of opposition side, at described the second engaging zones, engage.
And, described secondary cell further comprises the container that holds described core, and be arranged on the periphery wall of described container and the safety valve of being opened when interior pressure of surpass setting, be arranged on the binding part in the scope relative with described safety valve, direction in the periphery along described positive pole and described negative pole, be less than the described binding part being set in outside described scope, be arranged on the non-binding part in the scope relative with described safety valve, in the direction of the periphery along described positive pole and described negative pole, be greater than the described non-binding part being set in outside described scope.
And described binding part has width in the direction of the periphery away from described positive pole and described negative pole, and the bond length in the inner circumferential side of the above barrier film of direction of the periphery along described positive pole and described negative pole is less than the bond length of the outer circumferential side of described barrier film.
And described binding part is greater than described non-binding part at the non-bond length of the outer circumferential side of described barrier film at the bond length of the outer circumferential side of described barrier film.
Described positive pole and described negative pole comprise anodal current-collecting terminals and the negative pole current-collecting terminals of interlocking and extending more laterally than the periphery of described barrier film with described first side or described Second Edge.
Now, described anodal current-collecting terminals and described negative pole current-collecting terminals are at least being traversed the scope of described engaging zones respectively, comprise be formed with along stacked direction, connect more than the joint portion in a hole, described barrier film is for along the adjacent barrier film of stacked direction, and the described joint portion by described anodal current-collecting terminals and described negative pole current-collecting terminals engages.
According to the secondary cell of an example of the present invention, the barrier film inserting between positive pole and negative pole has first side and is positioned at the Second Edge of its opposite side, and for the barrier film along the adjacent at least one side of stacked direction, the mode alternately forming with binding part and non-binding part, the engaging zones in each layer of core with intermittent engagement, this engaging zones comprises the second engaging zones engaging between the first engaging zones of engaging between first side and Second Edge, therefore can suppress barrier film contraction and while can the easily discharge of the outside from non-binding part to core by the gas producing at electrode surface.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of the secondary cell of the first example of the present invention.
Fig. 2 blocks the cutaway view of the core of Fig. 1 along stacked direction.
Fig. 3 illustrates the diagram of the engaging zones of barrier film along the section of the F3-F3 line of Fig. 2.
Fig. 4 blocks the cutaway view of core of the secondary cell of the second example of the present invention along stacked direction.
Fig. 5 illustrates the diagram of the engaging zones of barrier film along the section of the F5-F5 line of Fig. 4.
Fig. 6 is the diagram that the engaging zones of barrier film while observing the core of secondary cell of the 3rd example of the present invention along stacked direction is shown.
Fig. 7 is the diagram that the engaging zones of barrier film while observing the core of secondary cell of the 4th example of the present invention along stacked direction is shown.
Fig. 8 is the diagram that the engaging zones of barrier film while observing the core of secondary cell of the 5th example of the present invention along stacked direction is shown.
Fig. 9 blocks the cutaway view of core of the secondary cell of the 6th example of the present invention along stacked direction.
Figure 10 illustrates the diagram of the engaging zones of barrier film along the section of the F10-F10 line of Fig. 9.
Figure 11 is the diagram that amplifies the joint portion of Figure 10.
[description of reference numerals]
1: secondary cell
2: container
21: safety valve
10: core
11: barrier film
111: first side
112: Second Edge
12: positive pole
121: anodal 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
Embodiment
Secondary cell 1 for the first example of the present invention, describes referring to figs. 1 to Fig. 3.Secondary cell 1 shown in Fig. 1 comprises the square container 2 of both ends open; Seal the electrode cap 3 of each peristome; And be contained in the core (duplexer) 10 in container 2.Container can be metal tank (can) container, can be also the bag-like container being formed by laminated film (laminated film).Container 2 as shown in Figure 1 has safety valve 21 on periphery wall.If it is open that this safety valve 21 surpasses predefined interior pressure, thereby prevent that container 2 is impaired.
Anodal 12 and negative pole 13 between embed barrier film 11 and by positive pole 12 and the alternately laminated and formation core 10 of negative pole 13.Fig. 1 illustrates the state that launches positive pole 12, negative pole 13 and barrier film 11.Although the core 10 shown in Fig. 1 is that each positive pole of 5 12 and negative pole 13 are carried out to stacked structure, the laminates number of electrode is not limited to this.As shown in Figures 2 and 3, anodal 12 form the little circle of overall dimension of comparing negative pole 13.Barrier film 11 forms the overall dimension that is greater than negative pole 13.This barrier film 11 comprises first side 111 and is positioned at the Second Edge 112 of its opposite side.
As shown in Figure 2, anodal 12 are for example formed with the anodal material 122 being formed by positive active material on the face of the both sides of the anodal current-collecting terminals 121 of dimetric paper tinsel shape aluminium manufacture.As shown in Figure 2, negative pole 13 is formed with the negative pole material 132 being formed by negative electrode active material on the face of the both sides of the negative pole current-collecting terminals 131 of dimetric paper tinsel shape copper production.And anodal 12 comprise and compare the scope that formed by anodal material 122 laterally by the positive wire portion 123 of the part extension of anodal current-collecting terminals 121.Negative pole 13 comprises the negative wire portion 133 that the scope that formed by negative pole material 132 is extended by a part for negative pole current-collecting terminals 131 laterally that compares.Positive wire portion 123 extends laterally with the periphery that negative wire portion 133 compares barrier film 11.
In this example, as shown in Figure 1 to Figure 3, the first side 111 of barrier film 11 traverses and a part for the anodal current-collecting terminals 121 of extending in anodal 12 positive wire portion 123, in each figure, extends downwards.The negative wire portion 133 of negative pole 13 be traverse the opposite side that is positioned at first side 111 barrier film 11 Second Edge 112 and a part for the negative pole current-collecting terminals 131 of extending is extended upward in each figure.That is, anodal 12 positive wire portion 123 extends by contrary mutually direction with the negative wire portion 133 of negative pole 13.
Barrier film 11, for the barrier film 11 along the adjacent at least one end of stacked direction, replaces with binding part M and non-binding part S the mode forming, and has the engaging zones K of intermittent engagement at each layer of core 10.This engaging zones K comprises the second engaging zones K2 of intermittent engagement between the first engaging zones K1 of intermittent engagement between first side 111 and Second Edge 112.In this example, as shown in Figure 2, along a side of extending with positive wire portion 123, be at least that the limit that opposition side forms is Second Edge 112, make binding part M and non-binding part S alternative arrangement to form the second engaging zones K2 of intermittent engagement, edge is that the limit that opposition side forms is first side 111 with the side that negative wire portion 133 extends, and makes binding part M and non-binding part S alternative arrangement to form the first engaging zones K1 of intermittent engagement.
And, binding part M be in the situation that supply with can make barrier film 11 fusings so that engage sufficient hot in do not follow local thermal contraction to engage.Therefore,, except the thermal weld of heater in the past, also can weld according to laser beam or ultrasonic wave.And also can engage according to binding agent etc.In this manual, will engage with heat fusing and be called " welding ".Also material self fusing can be engaged and is called " fusion ".
When a barrier film 11 is observed, barrier film 11, for along the stacked direction adjacent distolateral barrier film of side at one end, engages at the first engaging zones K1, and for along stacked direction at the adjacent opposition side barrier film of opposition side, at the second engaging zones K2, engage.In other words, when barrier film 11 is along a limit in four limits of the periphery of positive pole 12 and negative pole 13, when along stacked direction barrier film 11 intermittent engagement that at one end side is adjacent, the opposite side on engaged one side, with along stacked direction in adjacent barrier film 11 intermittent engagement of opposition side.In this example, as shown in Figure 2, the opposition side that side one of is traversed by negative wire portion 133 is the barrier film 11 of first side 111 intermittent engagement, the opposite side of its first side engaging 111 be Second Edge 112 with along stacked direction in adjacent barrier film 11 intermittent engagement of opposition side.The barrier film 11 engaging with the barrier film 11 of high order end in Fig. 2 in first side 111, be in Fig. 2 from left side second barrier film 11, along stacked direction, be positioned at the barrier film 11 of opposition side with the barrier film 11 with respect to the leftmost side in Fig. 2, in Fig. 2, from left side, the 3rd barrier film 11 engages.So, a barrier film 11, is positioned at the different barrier films 11 of opposition side from the relative at one end barrier film 11 of side engagement along stacked direction, in the position that becomes opposite side, engage.
In this example, as shown in Figure 3, at the 3rd limit 113 with respect to first side 111 and Second Edge 112 orthogonals and opposite side thereof, be also formed with the engaging zones K of intermittent engagement on the 4th limit 114.And in each limit, binding part M has width along the direction of traversing each limit away from the direction in week outside positive pole 12 and negative pole 13.
For the secondary cell forming as mentioned above, along stacked direction, engage the part of barrier film 11, have with binding part M and non-binding part S along anodal 12 and negative pole 13 outside the engaging zones K of mode intermittent engagement of limit alternate configurations in week.And this engaging zones K at least comprises and is bonded with each other along the first engaging zones K1 of the first side 111 of the adjacent barrier film 11 of stacked direction and is bonded with each other along the second engaging zones K2 of the Second Edge 112 of the adjacent barrier film 11 of stacked direction.Therefore,, while uprising due to abnormal excessive temperature overheated and secondary cell 1, can suppress barrier film 11 and shrink with the plane of positive pole 12 and negative pole 13 according to this heat.
For the secondary cell 1 of the first example, anodal current-collecting terminals 121 is interlocked and extends more laterally than the periphery of barrier film 11 with first side 111, and negative pole current-collecting terminals 131 is interlocked and extends more laterally than the periphery of barrier film 11 with Second Edge 112.On first side 111, form the first engaging zones K1, on Second Edge 112, form the second engaging zones K2.That is, can effectively suppress barrier film 11 is that the direction that contact conductor extends is shunk along the part of each current-collecting terminals, and then can prevent from contacting between electrode.
Therefore due to binding part, M intermittently configures, even when barrier film 11 shrinks and then take binding part M when starting point is split, due to this binding part M, only some splits, so can suppress to split on a large scale.
And even produce gas from positive pole 12 and the negative pole 13 of secondary cell 1, due to the barrier film 11 of this secondary cell 1 and adjacent barrier film 11 intermittent engagement, the gas therefore producing can easily be expelled to the outside of core 10 by non-binding part S.Because gas is discharged to from the nearest peripheral part in position producing, therefore can suppress the distortion of secondary cell 1.
Below, for the of the present invention second secondary cell 1 to the 6th example, in conjunction with each accompanying drawing, describe.For the structure having with secondary cell 1 identical function of the first example, use identical symbol and in each accompanying drawing, also give identical symbol, and detailed declaratives are recorded according to the correspondence of the first example and need to be with reference to accompanying drawing simultaneously.
For the secondary cell 1 according to the second example of the present invention, with reference to figure 4 and Fig. 5, describe.The mode that this secondary cell 1 alternately forms with at least one the limit binding part M in four limits along week outside positive pole 12 and negative pole 13 and non-binding part S, for carrying out intermittent engagement along the adjacent barrier film 11 of stacked direction.In the second example, when a barrier film 11 is observed, anodal 12 and negative pole 13 outside the barrier film 11 of intermittent engagement on a limit in four limits in week, on the opposite side on an engaged limit with further along the adjacent barrier film phase intermittent engagement of stacked direction.
The situation of this second example, as shown in Figure 4, the barrier film 11 engaging on first side 111, is being positioned on the Second Edge 112 of its opposite side also and identical barrier film 11 intermittent engagement.That is, embed negative pole 13 and along the adjacent barrier film 11 that has embedded negative pole 13 in centre of stacked direction intermittent engagement on first side 111 and Second Edge 112 each other.The negative wire portion 133 of negative pole 13 traverses the part of Second Edge 112 and can not weld.Therefore, by near negative wire portion 133 and the bonding area of the binding part M of configuration becomes large, with the bond strength of guaranteeing to need.
And identical with the first example, in the 3rd limit 113 and the 4th limit 114, also form the bonded areas K that is intermittently provided with binding part M in the mode around negative pole 13.In order to maintain anodal 12 and the relative position of negative pole 13, also can by the 3rd limit 113 and opposite side thereof the 4th limit 114 intermittent engagement embed anodal 12 and along stacked direction adjacent in centre, embedded anodal 12 barrier film 11.
The secondary cell 1 of the second example forming as mentioned above, because barrier film 11 engages respectively in the middle of first side 111 sides and Second Edge 112 sides are embedded in negative pole 13, therefore can prevent that temperature because of abnormal overheated secondary cell 1 from uprising according to negative pole 13 and cause barrier film 11 to shrink.Even and by barrier film 11 around positive pole 12 and surrounding's generation gas of negative pole 13, due to barrier film 11 intermittent engagement, so gas can be discharged to by non-binding part S the outside of core.
For according to the secondary cell 1 of the 3rd example of the present invention, with reference to figure 6, describe.For the core 10 of the secondary cell 1 shown in Fig. 6, make to be arranged in be arranged on container 2 outside the binding part MA of barrier film 11 of the relative scope of safety valve 21 on perisporium, be less than along anodal 12 and negative pole 13 outside the binding part M beyond this scope in the direction in week.And make to be arranged on the non-binding part SA in the scope relative with safety valve 21, be greater than the non-binding part S beyond this scope in the direction along week outside positive pole 12 and negative pole 13.That is, make the disposition interval of the binding part MA of the scope relative with safety valve 21 become large.
Direction along periphery outside barrier film 11, respectively the length of general binding part M is defined as to ML1, the length of the binding part MA of the scope relative with safety valve 21 is defined as to ML2, the length of general non-binding part S is defined as to SL1, when the length of the non-binding part SA of the scope relative with safety valve 21 is defined as to SL2, ML1>ML2, SL1<SL2.Preferably, make the length SL2 of non-binding part SA be greater than the length M L2 of the binding part MA of the scope relative with safety valve 21, i.e. ML2<SL2.
As mentioned above, by the length M L2 of the binding part MA of the scope relative with safety valve 21 being shortened and making the length SL2 of non-binding part SA elongated, increase aperture opening ratio.In order to ensure the bond strength of each binding part M, also can not change the size of binding part M and only expand disposition interval and only make non-binding part SA become large.
By expanding the non-binding part SA of the scope relative with safety valve 21, can make the gas of the inside generation of core easily to safety valve 21 sides, discharge.By energetically the gas of generation being sidelong out to safety valve 21, can prevent that barrier film 11 is impaired.
Secondary cell 1 for the 4th example related to the present invention, describes with reference to figure 7.For the core 10 of the secondary cell 1 shown in Fig. 7, be arranged on the i.e. binding part M on the 4th limit 114 of the 3rd limit 113 of barrier film 11 and opposite side thereof, away from anodal 12 and negative pole 13 outside the direction in week there is width.And the weld length ML3 of the inner circumferential side of binding part M forms the weld length ML4 that is less than outer circumferential side along the direction in week outside positive pole 12 and negative pole 13.With the length of inner circumferential side, be less than the trapezoidal formation binding part M of outer circumferential side length.In other words, the length SL3 of the inner circumferential side of non-binding part S is greater than the length SL4 of outer circumferential side.
By formation binding part M like this and non-binding part S, the gas that the inside of core 10 produces can more easily be emitted to outside by non-binding part S, and also can suppress to sneak into during fabrication the inside that fine materials such as sheet metal between core 10 and container 2 enter into core 10.Therefore, better if the weld length ML4 of the outer circumferential side of binding part M is greater than the length SL4 of outer circumferential side of non-binding part S.
Secondary cell 1 for the 5th example related to the present invention, describes with reference to figure 8.For the core 10 of the secondary cell 1 shown in Fig. 8, the shape of binding part M is different from the 4th example.The weld length ML3 of the inner circumferential side of the binding part M of the 5th example is almost nil, thus binding part M be shaped as the triangle in inner circumferential side as shown in Figure 8 with summit.By formation binding part M like this, the gas that the inside of core 10 produces, when the flows outside to core 10, owing to not being subject to the obstruction of binding part M, is therefore discharged and is become easy.
Secondary cell 1 for the 6th example related to the present invention, describes with reference to figure 9 and Figure 10.In the core 10 of the secondary cell 1 shown in Fig. 9 and Figure 10, barrier film 11 for the two ends in first side 111 sides and Second Edge 112 sides along the adjacent barrier film 11 of the stacked direction of electrode, along the direction intermittent engagement of first side 111 and Second Edge 112.Now, in order to improve the bond strength of 11, the barrier film of the scope that anodal current-collecting terminals 121 and negative pole current-collecting terminals 131 traversed, anodal current-collecting terminals 121 and negative pole current-collecting terminals 131 are at least in the scope of traversing the engaging zones K that is formed at periphery outside barrier film 11, be now the scope of traversing the first engaging zones K1 and the second engaging zones K2, form the joint portion 124,134 being formed by a plurality of holes that connect along stacked direction.As shown in figure 11, joint portion 124,134 as so-called perforated plate, can get through a plurality of circular holes, also the peristome of the bonding area formed objects of configurable and binding part M.
Anodal current-collecting terminals 121 and negative pole current-collecting terminals 131 have joint portion 124,134, can along stacked direction, in centre, embed anodal current-collecting terminals 121 and negative pole current-collecting terminals 131 thus and welding barrier film 11.By joint portion 124,134, weld barrier film 11, barrier film 11 is fixed to anodal current-collecting terminals 121 and negative pole current-collecting terminals 131 thus.Now, barrier film 11 is fixing with anodal current-collecting terminals 121 at first side 111, fixing with negative pole current-collecting terminals 131 at Second Edge 112.That is,, because a pair of opposite side of barrier film 11 is fixed, therefore can suppresses barrier film 11 and shrink because of heat.
And, according to the secondary cell 1 of this example, between the Second Edge 112 of the barrier film 11 at anodal current-collecting terminals 121 opposition sides, and to when engaging respectively between the first side 111 of the barrier film 11 at negative pole current-collecting terminals 131 opposition sides, can be along the joint portion 124,134 of the overlapping anodal current-collecting terminals 121 of stacked direction and negative pole current-collecting terminals 131 and weld.That is, due to anodal 12 and negative pole 13 between embed barrier film 11 and stacked anodal 12 and negative pole 13 after can weld in the lump, so can improve the productivity of core 10 and the productivity of secondary cell 1.
And the as above first to the 6th example can independent assortment and is implemented.For example,, as changed the binding part M of the scope relative with safety valve 21 and the size of non-binding part S in the 3rd example or also can being applicable to other examples as changed the shape etc. of binding part M in the 4th and the 5th example.
Claims (7)
1. a secondary cell, is included in and between positive pole and negative pole, embeds barrier film and by anodal and negative pole is alternately laminated and the core of formation, the Second Edge that described barrier film has first side and is positioned at its opposite side,
At each layer of described core, described barrier film, for the barrier film along the adjacent at least one end of stacked direction, has the engaging zones of the mode intermittent engagement alternately forming with binding part and non-binding part,
Described engaging zones comprises by the first engaging zones of intermittent engagement between described first side and by the second engaging zones of intermittent engagement between described Second Edge.
2. secondary cell as claimed in claim 1, it is characterized in that described barrier film is for along the stacked direction adjacent distolateral barrier film of side at one end, at described the first engaging zones, engage, for along stacked direction at the adjacent opposition side barrier film of opposition side, at described the second engaging zones, engage.
3. secondary cell as claimed in claim 1 or 2, is characterized in that further comprising the container that holds described core, and is arranged on the periphery wall of described container and the safety valve of being opened when surpassing interior pressure of setting,
Be arranged on the binding part in the scope relative with described safety valve, in the direction of the periphery along described positive pole and described negative pole, be less than the described binding part being set in outside described scope,
Be arranged on the non-binding part in the scope relative with described safety valve, in the direction of the periphery along described positive pole and described negative pole, be greater than the described non-binding part being set in outside described scope.
4. secondary cell as claimed in claim 3, it is characterized in that described binding part has width in the direction of the periphery away from described positive pole and described negative pole, and the bond length in the inner circumferential side of the above barrier film of direction of the periphery along described positive pole and described negative pole is less than the bond length of the outer circumferential side of described barrier film.
5. secondary cell as claimed in claim 4, is characterized in that described binding part is greater than described non-binding part at the non-bond length of the outer circumferential side of described barrier film at the bond length of the outer circumferential side of described barrier film.
6. secondary cell as claimed in claim 3, is characterized in that described positive pole and described negative pole comprise anodal current-collecting terminals and the negative pole current-collecting terminals of interlocking and extending more laterally than the periphery of described barrier film with described first side or described Second Edge.
7. secondary cell as claimed in claim 6, is characterized in that described anodal current-collecting terminals and described negative pole current-collecting terminals at least traversing the scope of described engaging zones respectively, comprise be formed with along stacked direction, connect more than the joint portion in a hole,
Described barrier film is for along the adjacent barrier film of stacked direction, and the described joint portion by described anodal current-collecting terminals and described negative pole current-collecting terminals engages.
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 true CN104112835A (en) | 2014-10-22 |
| CN104112835B CN104112835B (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410153885.9A Expired - Fee Related CN104112835B (en) | 2013-04-17 | 2014-04-16 | Secondary cell |
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| Country | Link |
|---|---|
| JP (1) | JP6163847B2 (en) |
| KR (1) | KR101589811B1 (en) |
| CN (1) | CN104112835B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577004A (en) * | 2014-12-25 | 2015-04-29 | 山东神工海特电子科技有限公司 | Polymer lithium ion battery with fixed diaphragm and manufacturing method thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7047842B2 (en) * | 2017-07-14 | 2022-04-05 | 日本電気株式会社 | A bag-shaped separator for a power storage device, its heat bonding method and heat bonding device, and a power 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 |
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| 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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| 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 |
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- 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104577004A (en) * | 2014-12-25 | 2015-04-29 | 山东神工海特电子科技有限公司 | Polymer lithium ion battery with fixed diaphragm and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101589811B1 (en) | 2016-01-28 |
| JP2014211974A (en) | 2014-11-13 |
| CN104112835B (en) | 2016-08-31 |
| KR20140125305A (en) | 2014-10-28 |
| JP6163847B2 (en) | 2017-07-19 |
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