CN104466221B - Secondary battery - Google Patents
Secondary battery Download PDFInfo
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- CN104466221B CN104466221B CN201410478385.2A CN201410478385A CN104466221B CN 104466221 B CN104466221 B CN 104466221B CN 201410478385 A CN201410478385 A CN 201410478385A CN 104466221 B CN104466221 B CN 104466221B
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- 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
- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
A secondary battery which prevent a short circuit between electrodes with a simple structure and is easy to discharge gas generated in the electrodes is provided. A lithium ion battery (secondary battery) has a diaphragm arranged between the positive electrode and the negative electrode and overlapping cores of the positive electrode and the negative electrode alternately. The diaphragm, on its outer periphery, has a first side and the opposite side of the first side, namely a second side. The positive electrode has a positive electrode current collector, a positive electrode active material and an insulating part. The positive electrode current collector has a positive electrode lead wire more protrusive than the first side. The insulating part is formed on two surfaces of the positive electrode lead wire which is isolated from the edge of the positive electrode active material at least to the outer periphery of the diaphragm. The insulating part is, in a state that the cores are formed, encapsulates the first side of the diaphragm on two sides of the negative electrode in the overlapping direction.
Description
Technical field
The present invention relates to barrier film is sandwiched between positive plate and negative plate, at the end of the positive plate and negative plate being alternately arranged
There is between portion the secondary cell for preventing short-circuit structure.
Background technology
The secondary cells such as lithium ion battery are with barrier film is sandwiched between positive plate and negative plate, and are alternately arranged positive plate
With the core of negative plate.Generally have, barrier film is sandwiched between the positive plate and negative plate of short-movie shape, which is weighed repeatedly to thickness direction
Folded cascade type core, and barrier film is sandwiched between the negative plate of the positive plate of long ribbon shape, by the rollback type core of its roll overlap
The heart.Positive plate is, on two sides with the positive active material mixture layer that positive active material is coated with base material aluminium foil, and
One lateral edges have the positive wire for exposing aluminium foil.Negative plate is to be coated with negative electrode active with base material Copper Foil on two sides
The negative electrode active material mixture layer of material, and there is the negative wire for exposing Copper Foil in another lateral edges.
Positive wire and negative wire are the barrier film both sides of the edge configured between positive plate and negative plate each other to contrary
Side projects.Now, because the coating of the width ratio negative electrode active material mixture layer of the dispensing area of positive active material mixture layer
The narrow width in region, so in negative electrode active material mixture layer and positive wire to in the range of, needing to consider to cause not send out
Raw short circuit.
The foreign conducting matters such as the electrode fragment that the reason for inter-electrode short-circuit possibly produces in the fabrication process cause.It is this
Foreign body is not only in direct contact between electrode and causes short circuit, and is dissolved in after electrolyte is ionized, and the reduction at the negative pole is separated out
And ingotism (Dendrite) is formed, can also cause short circuit.
The square lithium ion secondary battery recorded in patent documentation 1 has the rolled electrode group (core) of rollback type.Positive pole
Plate is that have insulating barrier on the border of positive wire and positive active material mixture layer.This insulating barrier is to overlap positive-active
The lateral margin of material mixture layer, and formed with the thickness equal with positive active material mixture layer.Just covered with insulating barrier and barrier film
The basic courses department of pole lead, thus negative electrode active material mixture layer and positive wire are not contacted.
However, in discharge and recharge of the secondary cell as lithium ion battery after just manufacturing, producing around electrode
If dry gas.The performance of battery if this gas residue is in-between the electrodes, is not only reduced, and makes battery case expansion etc.
Deformation Reasons, so should discharge.Patent documentation 1 disclose lithium ion battery as a example by, with positive active material mixture layer
Equal thickness forms insulating barrier.This insulating barrier is that the basic courses department of positive wire is covered together with barrier film, to make which with surrounding
Isolation.Therefore, the gas of generation is difficult to insulating barrier side to discharge.
By taking the core of cascade type as an example, the end of interface membrane so that positive pole is mutually not in contact with each other with negative pole.But, whenever
During stacking, for interface membrane, manufacturing process becomes complicated, and production efficiency is reduced.And, if wanting interface membrane after stacking,
The scope between positive wire can not be engaged.In addition, by taking the core of rollback type as an example, if wind together with positive pole and negative pole every
Film, as the difference of circumference gradually produces dislocation.Therefore, if winding after interface membrane, can be deformed, junction surface can
Be able to can peel off.
Prior art literature
Patent documentation 1
Japanese Patent Publication 2011-216403 publications
The content of the invention
In consideration of it, the present invention provides one kind prevents interelectrode short circuit with simple structure, and it is easy to discharge in electrode product
The secondary cell of raw gas.
Had according to the secondary cell of an embodiment of the invention and sandwich barrier film between a positive electrode and a negative electrode, it is alternately laminated just
Pole and the core of negative pole.Barrier film its outer peripheral edge with first while and its during opposite side i.e. second.Just having positive electrode collector, just
Pole active substance and insulation division.Positive electrode collector possesses the positive wire more prominent than the first side of barrier film.Positive active material
Two sides of the covering than the positive electrode collector of the outer peripheral edge inside scope of barrier film.Insulation division be from the edge of positive active material every
Formed on the two sides of the positive wire between the outer peripheral edge at least to barrier film.Negative pole has negative electrode collector and negative electrode active material
Matter.Negative electrode collector possesses the negative wire more prominent than the second side of barrier film.Negative electrode active material is in the outer peripheral edge than barrier film
Inside, cover than positive active material formed scope wider scope negative electrode collector two sides.And, insulation division
It is, in the state of core is formed, to make the end of covering negative pole, closing that the barrier film of negative pole both sides is configured in stacked direction
First side.
Now, insulation division is the scope from the scope inside formed than negative electrode active material at least to barrier film outer peripheral edge
Upper formation.As long as in addition, insulation division is formed with the part comprising the saturable more several emptying apertures of electrolyte.In addition, insulation
Portion includes：Cover positive wire and formed, and do not allow the first solid insulating barrier that electrolyte passes through；And cover the first insulation
Layer and formed, and the second insulating barrier comprising the saturable more several emptying apertures of electrolyte.The thickness of insulation division is, in the outer of barrier film
Peripheral position, the thickness of the positive active material to be formed in side of the positive electrode, and the negative electrode active material formed in negative side
The thickness that thickness is separately summed being formed, the thickness of thin of the thickness of first insulating barrier than the positive active material.It is described
The thickness of the first insulating barrier is uniform, the thickness of second insulating barrier be to the positive pole end it is gradually thickening formed.
Secondary cell of the invention, the lead of positive pole have insulation division.Barrier film, shape are sandwiched between a positive electrode and a negative electrode
Into stacking positive pole and negative pole core, thus along barrier film the first side negative end with stacked direction, be configured in negative pole
First side of the barrier film of both sides covers.Therefore, even if the foreign conducting matter such as electrode fragment for producing in the fabrication process is mixed into two
Primary cell, it is also possible to prevent the short circuit between positive pole that foreign body causes and negative pole.
In addition, according to shape in the scope from the scope inside formed than negative electrode active material at least to barrier film outer peripheral edge
Into the secondary cell of the present invention of insulant, the position of the positive wire for extending can be held from the first side.According to comprising electrolysis
The part of the saturable more several emptying apertures of liquid forms the secondary cell of the present invention of insulation division, and during assembling, electrolyte is easily impregnated with,
And be easily drained in the gas produced by discharge and recharge afterwards.
In addition, being included according to insulation division：Cover positive wire and formed, and do not allow electrolyte passes through solid first is exhausted
Edge layer；And cover the first insulating barrier and formed, and the sheet of the second insulating barrier comprising the saturable more several emptying apertures of electrolyte
The secondary cell of invention, will not produce ingotism from positive wire.Even if in addition, the metal for dissolving in electrolyte and existing
Near the positive wire during precipitation, the metal of precipitation is prevented to reach positive wire by the first insulating barrier.Accordingly it is possible to prevent just
Pole and the short circuit of negative pole.
It is with the thickness of the positive active material formed in side of the positive electrode according to the thickness in the outer peripheral edge position of barrier film, insulation division
Spend, and the thickness that the thickness of the negative electrode active material formed in negative side is separately summed is formed, and the thickness of the first insulating barrier
Than the secondary cell of the present invention of the thickness of thin of positive active material, the negative pole end of the first avris can be covered really with barrier film
Portion, while electrolyte is supplied to positive pole through the second insulating barrier of insulation division.And, it is also saturating through the electrolyte of the second insulating barrier
Barrier film is crossed, negative pole is thus also fed to.In addition, the attached of the positive pole and negative pole in the first avris can be discharged by the second insulating barrier
The nearly gas for producing.
Description of the drawings
Fig. 1 is the secondary cell axonometric chart according to first embodiment of the present invention.
Fig. 2 is the core exploded perspective view of secondary cell shown in Fig. 1.
Fig. 3 is the laminated portions amplification view of core shown in Fig. 2.
Fig. 4 is the core sectional view of the secondary cell according to the second embodiment of the invention.
Description of reference numerals
1：Lithium ion battery (secondary cell) 10：Core
11：Positive pole 111：Positive electrode collector
112：Positive active material 113：Positive wire
12：Negative pole 121：Negative electrode collector
122：Negative electrode active material 123：Negative wire
13：Barrier film 131：First side
132：Second side 13A：Outer peripheral edge
14：Insulation division 141：First insulating barrier
142：Second insulating barrier T1：(positive active material) thickness
T2：(negative electrode active material) thickness
T4：(thickness of positive active material is added with the thickness of negative electrode active material) thickness
Specific embodiment
To the secondary cell according to first embodiment of the present invention, as a example by being useful in the situation of lithium ion battery 1, reference picture
1 to Fig. 3 is illustrated.It is that core 10 and electrolyte are housed in housing 2, in peristome in the lithium ion battery 1 shown in Fig. 1
21 are provided with lid 3.Housing 2 is, in addition to square container as shown in Figure 1, can be cylinder type, can also be with laminated thin
The pouch-type that film is formed.Positive terminal 101 and negative terminal 102 are distinguished insertion lid 3 and are arranged.
Core 10 is with barrier film 13 is sandwiched between positive pole 11 and negative pole 12, and alternately laminated configuration positive pole 11 and negative pole
12 structure.The core 10 of this embodiment is, as shown in Fig. 2 the longer barrier film 13 of banding is sandwiched in positive pole 11 and negative pole
Between 12, by the same rollback type core 10 for being respectively the longer positive pole 11 of banding and the winding of negative pole 12.
In this embodiment, as shown in Fig. 2 barrier film 13 has the first side 131 along banding length direction and is located at which
Second side 132 of opposite side.Barrier film 13 is, for example, with polyethylene (Polyethylene) or polypropylene (Polypropylene) etc.
The fine porous film manufacture of polyolefin (Polyolefin) class, and electrolyte is kept in emptying aperture.
Positive pole 11 is, as shown in figure 3, having positive electrode collector 111, positive active material 112 and insulation division 14.Positive pole collection
Electric body 111 possesses the positive wire 113 more prominent than the first side 131 of barrier film 13.In this enforcement state, positive electrode collector 111
It is aluminium foil.Positive active material 112 is formed as the positive electrode collector 111 for covering the outer peripheral edge 13A insides scope than barrier film 13
Two sides.Positive active material 112 is that electrode material powder is dissolved into slurry (Slurry) with solvent, and is uniformly coated to
The two sides of positive electrode collector 111, are dried and are formed.Positive active material 112 is for example with LiMn2O4.Insulation division 14 is from just
Rise at least to the positive wire 113 between the outer peripheral edge 13A of barrier film 13 position of the edge 112A isolation of pole active substance 112
Formed on two sides.In this embodiment, insulation division 14 is, as shown in Fig. 2 parallel to the edge 112A of positive active material 112
And formed.Insulation division 14 is coated with slurry in the same manner as positive active material 112.Insulation division 14 is from positive active material
112 isolation and is formed, therefore can with the coating simultaneously of positive active material 112, can also before positive active material 112 or
It is coated with afterwards.
Negative pole 12 has negative electrode collector 121 and negative electrode active material 122.Negative electrode collector 121 possesses than barrier film 13
The more prominent negative wire 123 in second side 132.In this enforcement state, negative electrode collector 121 is Copper Foil.Negative electrode active material 122
Be formed as the scope in the outer peripheral edge 13A insides than barrier film 13, cover than the wider model of the scope that positive active material 112 is formed
The two sides of the negative electrode collector 121 for enclosing.Negative electrode active material 122 is coated with slurry in the same manner as positive active material 112.It is negative
Pole active substance 122 is for example with graphite.
In addition, in this embodiment, as shown in figure 3, the insulation division 14 formed in positive pole 11 is, in the shape for forming core 10
Under state, to make the end 12A of covering negative pole 12, closing that the first side of the barrier film 13 of 12 both sides of negative pole is configured in stacked direction
131.That is, insulation division 14 is, in the outer peripheral edge 13A positions of barrier film 13, with the positive-active formed in 111 side of positive electrode collector
The thickness that the thickness T2 of the thickness T1 of material 112 and the negative electrode active material 122 formed in 121 side of negative electrode collector is separately summed
T4.Strictly, in the position of the outer peripheral edge 13A of barrier film 13, the thickness T4 of insulation division 14 also includes 121 half of negative electrode collector
Thickness.Therefore, positive pole 11 is configured in the both sides intervention barrier film 13 of negative pole 12 with stacked direction, thus the first side of barrier film 13
131 are extruded bending and be closely packed together by insulation divisions 14.
Now, in the face of positive active material 112 insulation division 14 end 14A, as shown in figure 3, positioned at than negative electrode active
The position of the scope inside that material 122 is formed, and formed with the thickness T1 identical thickness with positive active material 112.And
And, insulation division 14 is in the end 14B positioned at 13 outer peripheral edge 13A of barrier film, to make to reach thickness T4, along to the side of end 14B
Formed to gradually thickening.Therefore, insulation division 14 is clipped in the end 12A of negative pole 12 and fixes, and keeps positive wire 113.
In addition, insulation division 14 is with the part of the more several emptying apertures being impregnated with comprising electrolyte, such as with the material of ceramic-like
Formed.Therefore, after assembling lithium ion battery 1, in original charge or electric discharge, from the gas permeation insulation division that positive pole 11 is produced
14, discharge to the outside of core 10.In addition, the gas produced from negative pole 12, through the insulation division 14 of barrier film 13 or presses against diaphragm 13,
Outside to core 10 is discharged.In addition, insulation division 14 is formed from the edge 112A isolation of positive active material 112, therefore not
Can reduce from positive active material 112 and can release the area of lithium ion.
In the core 10 of Fig. 2 as constructed as above, positive pole 11 is for barrier film 13 is to the prominent positive wire in 131 side of the first side
113 state, negative pole 12 are, for barrier film 13 is to the state of the prominent negative wire in 132 side of the second side 123, to stagger respectively and weigh
It is folded.As shown in Fig. 2 with positive pole 11, barrier film 13, negative pole 12, barrier film 13 order, barrier film 13 is sandwiched between positive pole 11 and negative pole 12
Wind to form core 10 with the state for overlapping 4.The positive wire 113 prominent to 131 side of the first side, and to the second side 132
The negative wire 123 that side projects, bundlees to weld or the engagement such as soldering respectively to stacked direction.Extend from core 10 after binding
Positive wire 113 and negative wire 123 are connected to the positive terminal 101 and negative terminal 102 arrange on lid 3.
Lithium ion battery 1 is that the first side 131 of barrier film 13 is closed and the end of negative pole 12 by insulation division 14 as constructed as above
12A is capped.Therefore, even if the foreign conducting matter such as electrode fragment being mixed in the fabrication process is attached to the first side 131, also not
113 short circuit of positive wire can be made on negative pole 12.In addition, on the first side 131, barrier film 13 is closely packed together by insulation division 14,
But it is not engaged.That is, overlap positive pole 11, negative pole 12 and barrier film 13 and when winding, even if girth produces difference, will not also occur every
The phenomenon that film 13 is stretched or distorts.
In addition, in 132 side of the second side of barrier film 13, negative pole 12 is to form negative electrode active more laterally than the end of positive pole 11
Material 122, and negative wire 123 is extended with before which.Therefore, even if conductive foreign body enters 132 side of the second side, foreign body is not
Can reach makes 123 short circuit of negative wire in the position of positive pole 11.However, the position of the edge isolation from negative electrode active material 122
On, in the negative wire 123 of the position on the first side 131 of correspondence, insulation division 14 can be set in the same manner as positive wire 113.
To the secondary cell according to the second embodiment of the invention, as a example by being useful in the situation of lithium ion battery 1, reference
Fig. 4 is illustrated.The lithium ion battery 1 of the second embodiment is, the structure of its insulation division 14 and the lithium of first embodiment from
Sub- battery 1 is different, and other composition is identical with the lithium ion battery 1 of first embodiment.Therefore, in the second embodiment
Lithium ion battery 1, to composition of the composition with identical function with the lithium ion battery 1 of first embodiment, says in following
Bright imparting identical symbol, and detail explanation is just with reference to the record of first embodiment.
Fig. 4 is the cross section in the stacking direction of core 10 of 131 side of the first side for illustrating barrier film 13.Insulation division 14 has
First insulating barrier 141 and the second insulating barrier 142.First insulating barrier 141 is the solid parts for not allowing electrolyte to pass through, and covers positive pole
Lead 113 and formed.First insulating barrier 141 is formed with the material of synthetic resin agent.The thickness ratio of first insulating barrier 141 is just
The thickness T1 of pole active substance 112 is thin.Second insulating barrier 142 is the part containing the saturable more several emptying apertures of electrolyte, is covered
The first insulating barrier of lid 141 and formed.The thickness of the first insulating barrier 141 is uniform, and the thickness of the second insulating barrier 142 is to positive pole 11
End is formed gradually thickeningly.Material to the second insulating barrier 142, as long as the material of Xing Cheng Tu films, can adopt polyethylene
Or the TPO organic material such as polypropylene, or the inorganic material of ceramic-like.
According to the lithium ion battery 1 of the second embodiment as constructed as above, even if dendroid knot is formed in insulation division 14
Crystalline substance, can prevent ingotism from reaching positive wire 113 by the first insulating barrier 141 of insulation division 14.In addition, the first insulating barrier
Thickness of thin of 141 thickness than positive active material 112, in positive wire when thus just having carried out charging and discharging after assembled battery
The gas that 11 surrounding of positive pole of 113 sides is produced, can be discharged to the outside of core 10 by the second insulating barrier 142.
In addition, secondary cell of the invention is, and as a example by including the lithium ion battery 1 of rollback type core 10, explanation
First embodiment as above and the second embodiment, but same technology can also be adopted to cascade type core.
When the secondary cell for including cascade type core adopts technology according to the present invention, it is possible to obtain include rollback type core with above-mentioned
The effect identical effect obtained by the secondary cell (lithium ion battery 1) of the heart 10.
Claims (7)
1. a kind of secondary cell, including by outer peripheral edge with first while and the second side of opposite side when described first diaphragm clip
Enter between a positive electrode and a negative electrode, and the core of the alternately laminated positive pole and the negative pole,
The positive pole is included：Positive electrode collector, possesses the positive wire more prominent than first side of the barrier film；Positive pole is lived
Property material, cover than the barrier film outer peripheral edge inside scope the positive electrode collector two sides；And insulation division, formed
The two sides of the positive wire between outer peripheral edge of the edge isolation from the positive active material at least to the barrier film,
The negative pole is included：Negative electrode collector, possesses the negative wire more prominent than the second side of the barrier film；And negative pole is lived
Property material, in the inside of the outer peripheral edge than the barrier film, cover the scope wider scope formed than the positive active material
The negative electrode collector two sides,
The insulation division is, in the state of the core is formed, to make the end of the covering negative pole, closes with stacked direction
It is configured in first side of the barrier film of the negative pole both sides.
2. secondary cell according to claim 1, it is characterised in that
The insulation division is that the periphery at least to the barrier film is played than the scope inside that the negative electrode active material is formed
Formed in the scope of edge.
3. secondary cell according to claim 1 and 2, it is characterised in that
The insulation division is formed with the part comprising the saturable more several emptying apertures of electrolyte.
4. secondary cell according to claim 1 and 2, it is characterised in that
The insulation division is included：Cover the positive wire and formed, do not allow the first solid insulating barrier that electrolyte passes through；
And cover first insulating barrier and formed, and the second insulating barrier comprising the saturable more several emptying apertures of electrolyte.
5. secondary cell according to claim 4, it is characterised in that
The thickness of the insulation division is, in the outer peripheral edge position of the barrier film, to be lived with the positive pole formed in the side of the positive electrode
Property the thickness of material and the thickness that is separately summed of thickness of the negative electrode active material formed in the negative side formed,
Thickness of thin of the thickness of first insulating barrier than the positive active material.
6. secondary cell according to claim 4, it is characterised in that
The thickness of first insulating barrier is uniform, and the thickness of second insulating barrier is gradually thickening to the end of the positive pole
Formed.
7. secondary cell according to claim 1, it is characterised in that
The thickness of the insulation division is, in the outer peripheral edge position of the barrier film, to be lived with the positive pole formed in the side of the positive electrode
Property the thickness of material and the thickness that is separately summed of thickness of the negative electrode active material formed in the negative side formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013195259A JP6146232B2 (en) | 2013-09-20 | 2013-09-20 | Secondary battery |
| JP2013-195259 | 2013-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104466221A CN104466221A (en) | 2015-03-25 |
| CN104466221B true CN104466221B (en) | 2017-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410478385.2A Active CN104466221B (en) | 2013-09-20 | 2014-09-18 | Secondary battery |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6146232B2 (en) |
| KR (1) | KR101613019B1 (en) |
| CN (1) | CN104466221B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6622072B2 (en) * | 2015-12-01 | 2019-12-18 | 株式会社エンビジョンＡｅｓｃジャパン | Lithium ion secondary battery |
| JP6957837B2 (en) * | 2016-04-08 | 2021-11-02 | 株式会社Ｇｓユアサ | Power storage element |
| JP6834857B2 (en) * | 2017-09-04 | 2021-02-24 | トヨタ自動車株式会社 | How to manufacture a secondary battery |
| KR102096983B1 (en) | 2017-09-08 | 2020-04-03 | 주식회사 엘지화학 | Battery module with a structure to break a connector using venting gas |
| JP6923401B2 (en) * | 2017-09-14 | 2021-08-18 | 株式会社エンビジョンＡｅｓｃジャパン | Stacked batteries and battery modules |
| JP2019053917A (en) * | 2017-09-15 | 2019-04-04 | マクセルホールディングス株式会社 | Electrochemical element |
| CN108336286A (en) * | 2018-03-26 | 2018-07-27 | 珠海格力电器股份有限公司 | A kind of big soft bag lithium ionic cell and preparation method thereof |
| KR20200019087A (en) | 2018-08-13 | 2020-02-21 | 주식회사 엘지화학 | Stack-folding typed electrode assembly and lithium metal battery including the same |
| WO2020158137A1 (en) * | 2019-01-29 | 2020-08-06 | パナソニック株式会社 | Stacked secondary battery |
| CN114616707A (en) * | 2019-10-25 | 2022-06-10 | 夏普株式会社 | Laminated battery |
| CN117751490A (en) * | 2022-05-07 | 2024-03-22 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electricity utilization device |
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| KR20150032785A (en) | 2015-03-30 |
| CN104466221A (en) | 2015-03-25 |
| KR101613019B1 (en) | 2016-04-15 |
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