CN102122727A - Lithium ion battery and single battery thereof - Google Patents
Lithium ion battery and single battery thereof Download PDFInfo
- Publication number
- CN102122727A CN102122727A CN2011100321526A CN201110032152A CN102122727A CN 102122727 A CN102122727 A CN 102122727A CN 2011100321526 A CN2011100321526 A CN 2011100321526A CN 201110032152 A CN201110032152 A CN 201110032152A CN 102122727 A CN102122727 A CN 102122727A
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- anode
- current collector
- cathode
- ion battery
- diaphragm
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a lithium ion single battery comprising a cathode strip, an isolating membrane and an anode strip which are mutually winded or superposed, wherein the isolating membrane is spaced and arranged between the adjacent cathode and anode strips; the cathode strip comprises a cathode current collector and a cathode diaphragm attached on the cathode current collector; the anode strip comprises an anode current collector and an anode diaphragm attached on the anode current collector; a single-side or double-side uncovering part without being coated with the cathode diaphragm is arranged at the cathode current collector; a single-side or double-side uncovering part without being coated with the anode diaphragm is arranged at the anode current collector; an electronic isolating layer is coated on the boundary of the uncovering part of the cathode current collector or on the place corresponding to the boundary of the uncovering part of the cathode current collector on anode diaphragm or on the boundary of the uncovering part of the anode current collector; and the electronic isolating layer can be coated on the pole pieces through a coating device; therefore, the production efficiency of a lithium ion battery can be effectively enhanced without manual operation. In addition, the invention also discloses a lithium ion battery.
Description
Technical field
The invention belongs to the lithium ion battery field, more particularly, the present invention relates to a kind of lithium ion battery and battery cell thereof.
Background technology
Lithium ion battery is a kind of battery with ideal capacity density and good environmental-protecting performance, has energy density height, reliability height, processability is good and advantage such as non-environmental-pollution, so is widely used in all kinds of portable electric appts.
See also shown in Figure 1, the lithium ion battery of prior art comprises the lithium-ion battery monomer that several superpose successively, each lithium-ion battery monomer comprises cathode sheets 12, barrier film 14 and the anode strip 16 of mutual coiling or stack, wherein, barrier film 14 is interval between adjacent cathode sheets 12, the anode strip 16 with two kinds of pole pieces insulation, keeps electrolyte simultaneously.
When making lithium ion battery, as long as the lithium-ion battery monomer that several are above-mentioned is made battery, and on the coated outside of battery packing film, in it, inject electrolyte afterwards, get final product through finding time, sealing.Because the employed electrolyte of lithium ion battery is inflammable organic electrolyte at present, so very high to the security requirement of lithium ion battery.
But, be collector because cathode sheets 12, anode strip 16 all adopt metal, its manufacturing equipment also mostly is hardware, remains in the lithium-ion battery monomer so have little metallic particles unavoidably.In addition, also be easy to produce burr when cutting as the cathode sheets 12 of cathode current collector 122 with aluminium foil, therefore the barrier film 14 that plays insulating effect between cathode sheets 12, anode strip 16 is pierced sometimes, so that aluminium foil contacts and is short-circuited with anode diaphragm 164, cause inflammable organic electrolyte and catch fire, even cause battery to be blasted.
For fear of such security incident, generally can may stick adhesive tape 18 with the place that anode diaphragm 164 contact, to guarantee that aluminium foil still can keep insulating with anode diaphragm 164 when barrier film 14 is ineffective at the aluminium foil of cathode sheets 12.But taping 18 needs producers' manual operations, and efficient is lower, is unfavorable for enhancing productivity.
In view of this, necessary lithium ion battery and the battery cell thereof that provides a kind of security performance can guarantee production efficiency better, again.
Summary of the invention
The objective of the invention is to: provide a kind of security performance can guarantee the lithium ion battery and the battery cell thereof of production efficiency better, again.
In order to realize the foregoing invention purpose, the invention provides a kind of lithium-ion battery monomer, it comprises mutual cathode sheets, barrier film and anode strip around volume or stack, barrier film is interval between the adjacent anode and cathode slice.Cathode sheets comprises cathode current collector and attached to the negative electrode diaphragm on the cathode current collector, anode strip comprises anode collector and attached to the anode diaphragm on the anode collector, cathode current collector is provided with the exposed division of the uncoated negative electrode diaphragm of single or double, and anode collector is provided with the exposed division of the uncoated anode diaphragm of single or double.Boundary at the cathode current collector exposed division, or on the anode diaphragm with the corresponding position, border of cathode current collector exposed division, or being coated with one deck electrical isolation layer at the boundary of described anode collector exposed division, the electrical isolation layer can prevent that cathode current collector from contacting with anode diaphragm or anode collector.
As a kind of improvement of lithium-ion battery monomer of the present invention, described electrical isolation layer and anode and cathode diaphragm apply simultaneously.
As a kind of improvement of lithium-ion battery monomer of the present invention, described electrical isolation layer is the polymeric layer that contains metal oxide microparticle.
As a kind of improvement of lithium-ion battery monomer of the present invention, the polymer of described electrical isolation layer is selected from polyacrylic acid, Kynoar, butadiene-styrene rubber, siloxanes or its combination.
As a kind of improvement of lithium-ion battery monomer of the present invention, the metal oxide in the described electrical isolation layer is selected from Al
2O
3, ZrO, SiO
2, TiO or its combination.
To achieve these goals, the present invention also provides a kind of lithium ion battery, it comprises the packing film of battery, parcel battery and charges into electrolyte in the packing film, and battery comprises several battery cells, and battery cell is aforementioned lithium-ion battery monomer.
With respect to prior art, the present invention has the following advantages at least: the battery cell of lithium ion battery of the present invention plays the adhesive tape of buffer action with target collector and anode diaphragm in the electronics separator replacement prior art, the electrical isolation layer can be coated on cathode sheets or the anode strip by apparatus for coating, therefore do not need manual operations, can effectively improve the production efficiency of lithium ion battery.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the present invention and useful technique effect thereof are further elaborated.
Fig. 1 is the structural representation of prior art lithium-ion battery monomer.
Fig. 2 is the structural representation of lithium-ion battery monomer of the present invention.
Embodiment
Goal of the invention of the present invention, technical scheme and technique effect are more clear to be understood in order to make, and below in conjunction with the drawings and specific embodiments the present invention is further elaborated.Should be appreciated that the embodiment of describing in this specification only is in order to explain the present invention, is not in order to limit the present invention.
See also shown in Figure 2ly, lithium ion battery of the present invention comprises the lithium-ion battery monomer that several superpose successively, and each lithium-ion battery monomer comprises cathode sheets 52, barrier film 54 and the anode strip 56 of mutual coiling or stack.Barrier film 54 is interval between adjacent cathode sheets 52 and the anode strip 56 with two kinds of pole pieces insulation, is used to keep electrolyte simultaneously.
Cathode sheets 52 comprises that cathode current collector 522 and single or double attached to the negative electrode diaphragm 524 on the cathode current collector 522, contain cathode active material in the negative electrode diaphragm 524, and cathode current collector 522 adopts aluminium foil to make.Anode strip 56 comprises that anode collector 562 and single or double attached to the anode diaphragm 564 on the anode collector 562, contain anode active material in the anode diaphragm 564, and anode collector 562 adopts Copper Foil to make.The microporous membrane of barrier film 54 for adopting technologies such as plasticizing, extraction to make, such structure helps the maintenance that 54 pairs of barrier films contain the organic solvent electrolyte of lithium salts.
When making lithium ion battery, if with aforementioned cathode sheets 52, barrier film 54 and anode strip 56 by production requirement to make lithium-ion battery monomer around the mode of volume or stack, again several lithium-ion battery monomers are made battery.Packing film on the coated outside of battery injects electrolyte afterwards in it, operations such as process is found time, sealing can make lithium ion battery.
As can be seen from Figure 2, the exposed division 526 that comprises the uncoated negative electrode diaphragm 524 of single or double on the cathode current collector 522, the boundary of the exposed division 526 of cathode current collector 522 (the termination boundary of negative electrode diaphragm 524 just, if no special instructions, mentioned exposed division border all is meant the termination border of diaphragm in this specification and claims) be the position that is easy to generate burr on the cathode sheets 52, contacted with it barrier film 54 most probables are pierced.For fear of be pierced the security incident that causes because of barrier film 54, in illustrated embodiment, lithium-ion battery monomer applies one deck electrical isolation layer 60 by exposed division 526 boundaries at cathode current collector 522, when guaranteeing that barrier film 54 is ineffective, can not contact and be short-circuited with anode diaphragm 564 or anode collector 562 as the aluminium foil of cathode current collector 522.
Electrical isolation layer 60 is for containing the polymeric layer of metal oxide microparticle, and wherein, polymer is selected from polyacrylic acid, Kynoar (PVDF), butadiene-styrene rubber (SBR), siloxanes or its combination, and metal oxide is selected from Al
2O
3, ZrO, SiO
2, TiO or its combination.Electrical isolation layer 60 can apply simultaneously by apparatus for coating and negative electrode diaphragm 524, anode diaphragm 564, can not produce the phase mutual interference.
According to another implementation of the invention, electrical isolation layer 60 also can be coated on the anode strip 56 corresponding position, exposed division 526 border with cathode current collector 522.According to another execution mode of the present invention, comprise the exposed division 566 of the uncoated anode diaphragm 564 of single or double on the anode collector 562, exposed division 566 boundaries of anode collector 562 also can apply one deck electrical isolation layer 60.Be understandable that with the corresponding position, exposed division 526 border of cathode current collector 522, perhaps exposed division 566 boundaries of anode collector 562 can apply one deck electrical isolation layer 60 simultaneously on exposed division 526 boundaries of cathode current collector 522, the anode strip 56.
According to cathode sheets 52, anode strip 56 and barrier film 54 around the volume, the stack situation, electrical isolation layer 60 can be coated on the single or double of cathode sheets 52, anode strip 56 as required.In a word, be easy to impaired position, play preventing that cathode current collector 522 aluminium foils and anode diaphragm 564 or anode collector 562 contacted effects from getting final product as long as electrical isolation layer 60 can be coated in barrier film 54.Certainly, under possible situation, should consider to reduce the influence of 60 pairs of battery behaviors such as ionic conductivity of electrical isolation layer to the selection of electrical isolation layer 60 coating position as far as possible.
In sum, be coated with electrical isolation layer 60 on the cathode sheets 52 of lithium ion battery of the present invention, the ad-hoc location of anode strip 56, can guarantee the lithium ion battery accident that can not be short-circuited.Because electrical isolation layer 60 can be coated on cathode sheets 52, the anode strip 56 by apparatus for coating,, help improving the production efficiency of lithium ion battery so do not need manual operations.
Need to prove, though the present invention enhances productivity by the mode that replaces adhesive tape 18 of the prior art with electrical isolation layer 60, but can substitutedly be the adhesive tape of buffer action, in Fig. 2, the outermost adhesive tape 58 of lithium-ion battery monomer has been fixations, adhesive tape 58 herein can only keep or replace with other fixed form, and can not simply be replaced by electrical isolation layer 60.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although used some specific terms in this specification, these terms do not constitute any restriction to the present invention just for convenience of description.
Claims (6)
1. lithium-ion battery monomer, it comprises mutually around the cathode sheets of rolling up or superposeing, barrier film and anode strip, barrier film is interval between the adjacent anode and cathode slice, cathode sheets comprises cathode current collector and attached to the negative electrode diaphragm on the cathode current collector, anode strip comprises anode collector and attached to the anode diaphragm on the anode collector, cathode current collector is provided with the exposed division of the uncoated negative electrode diaphragm of single or double, anode collector is provided with the exposed division of the uncoated anode diaphragm of single or double, it is characterized in that: at the boundary of described cathode current collector exposed division, or on the anode diaphragm with the corresponding position, border of cathode current collector exposed division, or being coated with one deck electrical isolation layer at the boundary of described anode collector exposed division, the electrical isolation layer can prevent that cathode current collector from contacting with anode diaphragm or anode collector.
2. according to the described lithium-ion battery monomer of claim 1, it is characterized in that: described electrical isolation layer and anode and cathode diaphragm apply simultaneously.
3. according to the described lithium-ion battery monomer of claim 1, it is characterized in that: described electrical isolation layer is the polymeric layer that contains metal oxide microparticle.
4. lithium-ion battery monomer according to claim 3 is characterized in that: the polymer of described electrical isolation layer is selected from polyacrylic acid, Kynoar, butadiene-styrene rubber, siloxanes or its combination.
5. lithium-ion battery monomer according to claim 3 is characterized in that: the metal oxide in the described electrical isolation layer is selected from Al
2O
3, ZrO, SiO
2, TiO or its combination.
6. lithium ion battery, it comprises the packing film of battery, parcel battery, and charging into the interior electrolyte of packing film, battery comprises several battery cells, it is characterized in that: described battery cell is each described lithium-ion battery monomer in the claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100321526A CN102122727A (en) | 2011-01-30 | 2011-01-30 | Lithium ion battery and single battery thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100321526A CN102122727A (en) | 2011-01-30 | 2011-01-30 | Lithium ion battery and single battery thereof |
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|---|---|
| CN102122727A true CN102122727A (en) | 2011-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100321526A Pending CN102122727A (en) | 2011-01-30 | 2011-01-30 | Lithium ion battery and single battery thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980170A (en) * | 2017-12-28 | 2019-07-05 | 宁德新能源科技有限公司 | Electrode assembly and battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1585158A (en) * | 2003-08-19 | 2005-02-23 | 三星Sdi株式会社 | Jelly-roll type electrode assembly and secondary battery including the same |
| CN101609877A (en) * | 2009-07-20 | 2009-12-23 | 东莞新能源科技有限公司 | Lithium-ion electric core and anode pole piece thereof |
| CN101615694A (en) * | 2008-06-23 | 2009-12-30 | 三星Sdi株式会社 | The lithium secondary battery of electrode assemblie and this electrode assemblie of use |
-
2011
- 2011-01-30 CN CN2011100321526A patent/CN102122727A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1585158A (en) * | 2003-08-19 | 2005-02-23 | 三星Sdi株式会社 | Jelly-roll type electrode assembly and secondary battery including the same |
| CN101615694A (en) * | 2008-06-23 | 2009-12-30 | 三星Sdi株式会社 | The lithium secondary battery of electrode assemblie and this electrode assemblie of use |
| CN101609877A (en) * | 2009-07-20 | 2009-12-23 | 东莞新能源科技有限公司 | Lithium-ion electric core and anode pole piece thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980170A (en) * | 2017-12-28 | 2019-07-05 | 宁德新能源科技有限公司 | Electrode assembly and battery |
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Application publication date: 20110713 |
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