CN102842736A - High-safety lithium ion secondary battery - Google Patents

High-safety lithium ion secondary battery Download PDF

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Publication number
CN102842736A
CN102842736A CN2012103372327A CN201210337232A CN102842736A CN 102842736 A CN102842736 A CN 102842736A CN 2012103372327 A CN2012103372327 A CN 2012103372327A CN 201210337232 A CN201210337232 A CN 201210337232A CN 102842736 A CN102842736 A CN 102842736A
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CN
China
Prior art keywords
oxide
lithium
insulator film
anode
rechargeable battery
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CN2012103372327A
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Chinese (zh)
Inventor
于申军
田启友
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HANGZHOU WANHO WANJIA POWER BATTERY CO Ltd
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HANGZHOU WANHO WANJIA POWER BATTERY CO Ltd
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Priority to CN2012103372327A priority Critical patent/CN102842736A/en
Publication of CN102842736A publication Critical patent/CN102842736A/en
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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

Abstract

The invention discloses a high-safety lithium ion secondary battery, which comprises a sealed housing, wherein an anode, a cathode and electrolyte are contained in the sealed housing; a single layer or a plurality of layers of insulating membranes are arranged on the surface of the anode and/or the cathode; and each insulating membrane is in a porous structure. The high-safety lithium ion secondary battery having stable and reliable performance can solve the problem of a short circuit of the battery caused by fusion of an electrode membrane, so that safety accidents are avoided; and the high-safety lithium ion secondary battery has good safety performance, so that the normal use of the lithium ion battery for a long time is ensured, and the service life of the lithium ion secondary battery is prolonged. Therefore, the high-safety lithium ion secondary battery has a wide market application prospect and a significant productive practice meaning.

Description

A kind of high security lithium ion secondary battery
Technical field
The present invention relates to the battery technology field, particularly relate to a kind of high security lithium ion secondary battery.
Background technology
Advantages such as lithium ion battery has high working voltage, high-energy-density, has extended cycle life, non-environmental-pollution, the secondary chemical sources of electric energy as electric energy and chemical energy being transformed each other is regarded as one of popular candidate technologies of electric power energy-storage system.Since being born, its application constantly enlarges, and obtains development rapidly.At present; Not only on portable communication apparatus and portable electric appts, be used widely; And be widely used in Large Electric equipment aspects such as electric tool, electric bicycle and electric automobile; Therefore, increasingly high to the security performance requirement of lithium ion battery at present, how improving battery safety is the main direction of present each macrocell producer research.
For lithium rechargeable battery, because cell voltage is generally between 3 ~ 4.5V, so can not coefficient safe in utilization high water can only be used the higher carbonates solvent of reactance voltage as electrolyte solvent.This has just caused the battery of the security performance of lithium rechargeable battery not as water solvent, like plumbic acid, Ni-MH battery etc.
In order to improve the fail safe of lithium rechargeable battery, prior art personnel have done the research improvement aspect a lot, and the direction of primary study has electrode material, diaphragm material, electrolyte material.Wherein, diaphragm material also just improves on traditional polyolefin plastics barrier film, and matrix also is to use plastic material.The melt temperature of polyolefin plastics (like commercial polypropylene PP, polythene PE material) is all about 130 ~ 160 ℃; This has just caused battery when being higher than said temperature; The inner counter property electrode problem that will be short-circuited; Thereby violent heat release takes place, thereby cause security incident to take place, have influence on the safe in utilization of lithium rechargeable battery.
Therefore; Press at present and develop a kind of lithium rechargeable battery; It can solve electrode diaphragm and melt the battery short circuit problem that is caused, and avoids the generation of security incident, can have good security performance; Guarantee long-time normal use of lithium ion battery, prolong the useful life of lithium rechargeable battery.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of high security lithium ion secondary battery, it is stable and reliable for performance; Can solve electrode diaphragm and melt the battery short circuit problem that is caused, avoid the generation of security incident, can have good security performance; Guarantee long-time normal use of lithium ion battery; Prolong the useful life of lithium rechargeable battery, thereby have market application foreground widely, be of great practical significance.
For this reason, the invention provides a kind of high security lithium ion secondary battery, include seal casinghousing, include anode, negative electrode and electrolyte in the said seal casinghousing;
The surface of said anode and/or negative electrode has the single or multiple lift insulator film, and said insulator film possesses loose structure.
Wherein, the material of said negative electrode comprises at least a in lithium and cobalt oxides, lithium nickel oxide, lithium manganese oxide, lithium, cobalt, nickel and manganese oxide and the lithium iron phosphate;
The material of said anode comprises at least a in graphite, hard carbon, soft carbon, silica-base material and the tin-based material.
Wherein, said insulator film is the insulator film that includes ceramic insulating layer and adhesive layer and possess loose structure.
Wherein, the material of said ceramic insulating layer is oxide ceramic material or insulative nitride material;
Said oxide ceramic material comprises at least a in aluminium oxide, titanium oxide and the silica, and said insulative nitride material is a silicon nitride.
Wherein, the oxide ceramic material that comprises in the said ceramic insulating layer or the particle size range of insulative nitride material are 1 ~ 15 μ m.
Wherein, the use glue polarity that said adhesive layer adopted is for opposite with the polarity of the male or female of being fixed.
Wherein, the mode through adopting roller coating, spraying and heat seal to combine makes insulator film fix at said anode and/or cathode surface moulding.
Wherein, the thickness range of said insulator film is 15 ~ 60 μ m.
Wherein, the preparation process of a plurality of holes is on the said insulator film:
The first step: the colloidal sol roller coating that will include ceramic insulating layer material particle and easy volatile solvent is on a kind of base material;
Second step: baking then, make that the easy volatile solvent in the colloidal sol is vapored away, thus formed as the ceramic insulating layer material film of insulator film on preparation form a plurality of holes.
Wherein, said colloidal sol is aluminium oxide Al 2O 3Colloidal sol, at this moment, the material of said ceramic insulating layer is solid oxide aluminium Al 2O 3, said solid oxide aluminium Al 2O 3Al for the α type 2O 3Al with the γ type 2O 3In at least a, said solid oxide aluminium Al 2O 3Average particle size range be 2 μ m ~ 10 μ m;
Said aluminium oxide Al 2O 3It is solid-state Kynoar class or PP type glue that the adhesive layer of particle uses glue;
Said aluminium oxide Al 2O 3Mass ratio between particle and the Kynoar is 95:5;
Said aluminium oxide Al 2O 3Solute in the colloidal sol also includes silane coupler, said silane coupler and said aluminium oxide Al 2O 3Mass ratio between the particle is 1:100;
Said aluminium oxide Al 2O 3Solvent is N-methyl pyrrolidone NMP in the colloidal sol;
Said base material is the PET base material.
Visible by above technical scheme provided by the invention, compared with prior art, the invention provides a kind of high security lithium ion secondary battery; It is stable and reliable for performance, can solve electrode diaphragm and melt the battery short circuit problem that is caused, and avoids the generation of security incident; Can have good security performance, guarantee long-time normal use of lithium ion battery, prolong the useful life of lithium rechargeable battery; Thereby have market application foreground widely, be of great practical significance.
Description of drawings
Fig. 1 is for having the structural representation sketch of a kind of embodiment of pellumina of hole in a kind of high security lithium ion secondary battery provided by the invention;
The structural representation sketch of a kind of embodiment when Fig. 2 transfers on the anode material for the pellumina that has hole in a kind of high security lithium ion secondary battery provided by the invention;
Fig. 3 is the structural representation sketch of a kind of embodiment when cross layered between anode material, the pellumina with hole, the cathode material in a kind of high security lithium ion secondary battery provided by the invention;
Among the figure, 1 is the PET base material, and 2 is pellumina, and 3 is hole, and 4 is subsequent use glue layer, and 5 is the anode unreeling shaft, and 6 is the base material unreeling shaft, and 7 is the base material Scroll, and 10 is anode, and 20 is negative electrode.
Embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is done further detailed description below in conjunction with accompanying drawing and execution mode.
The invention provides a kind of high security lithium ion secondary battery, include seal casinghousing, include anode, negative electrode and electrolyte in the said seal casinghousing.
In the present invention, said seal casinghousing can be the housing that adopts aluminium, steel or plastic cement material to process, and perhaps said seal casinghousing can be the plastic film shell.
In the present invention, said electrolyte can include polyesters solvent and lithium salts solute, perhaps can be other nonaqueous electrolytic solutions.For example, said polyesters solvent can be methyl ethyl carbonate (EMC), and said lithium salts solute can be lithium hexafluoro phosphate (LiPF 6).
In the present invention, said anode and negative electrode have all possessed two kinds of functions, promptly as the insulator between energy memory bank and the anti-property electrode (opposing electrode).
Need to prove that for the present invention, said seal casinghousing is used to guarantee that the inside battery structure is hedged off from the outer world; Said used for electrolyte is in the transmitting medium that ion is provided; Said anode and negative electrode not only all as the energy memory bank, also possess electronic isolation property each other simultaneously;
In the present invention; For lithium rechargeable battery of the present invention; In order to let anode and negative electrode can be used as the energy storage body; The material of said negative electrode can be transition metal lithium oxide, specifically can comprise at least a in lithium and cobalt oxides, lithium nickel oxide, lithium manganese oxide, lithium, cobalt, nickel and manganese oxide and the lithium iron phosphate; The material of said anode can comprise that at least a in graphite, hard carbon, soft carbon, silica-base material and the tin-based material, these materials are the material that possesses storage lithium ability.
In the present invention; In order to let said anode and negative electrode can be used as insulator between the anti-property electrode; Be electronic isolation each other between the electrode of opposed polarity, on concrete the realization, the surface of said anode and/or negative electrode (being in anode and the negative electrode at least one) has the single or multiple lift insulator film.
In the present invention, said insulator film can be the porous composite construction of ceramic insulating layer and adhesive layer, is said insulator film for including ceramic insulating layer and adhesive layer and possessing the insulator film of loose structure (promptly having a plurality of holes).
On concrete the realization; The material of said ceramic insulating layer can be oxide ceramic material or insulative nitride material; Said oxide ceramic material specifically can comprise at least a in aluminium oxide, titanium oxide and the silica, and said insulative nitride material can be silicon nitride.
Need to prove; For the present invention, the particle size range of the ceramic particle that comprises in the said ceramic insulating layer (like oxide ceramic material or insulative nitride material) is 1 ~ 15 μ m, can not use the ceramic particle material that is lower than 500nm; When guaranteeing that said insulator film forms; Possess enough spaces between the adjacent ceramic particle and stay hole,, can fill and be used for the electrolyte that conducting ion is used through these holes.Therefore; For lithium rechargeable battery provided by the invention, anode that it comprises and negative electrode can intercept electrical conductivity each other through insulator film on the one hand; Avoid occurring the short circuit problem between the opposing electrode; Hold electrolyte owing to insulator film has possessed enough holes on the other hand, thereby can carry out ionic conduction, and then improve the necessary ionic conductance of lithium rechargeable battery work through the electrolyte in the insulator film hole.
Also need to prove, for the purpose of the present invention, if the hole that forms between two adjacent ceramic particles is too little, with not possessing enough ionic conductivities.Therefore, on concrete the realization, the particle size range of said ceramic particle (like oxide ceramic material or insulative nitride material) is preferably 3 ~ 5 μ m, to guarantee having enough holes and preferable processing characteristics between the adjacent ceramic particle.
In the present invention, what said adhesive layer adopted selects and the opposite polarity classification of electrode (male or female) of being fixed with glue is general, thereby prevents in the preparation process, and electrode, ceramic insulating film surface are corroded.
In the present invention, on concrete the realization, in order to let said insulator film fix on the surface of anode and/or cathode electrode, the mode that can adopt roller coating, spraying and heat seal to shift makes insulator film fix at anode and/or cathode electrode surface moulding.
In the present invention, on concrete the realization,, can adopt the mode of solvent flashing, in the film formed process of insulator,, make it to box out through drying volatile solvent in order on said insulator film, to form hole.
In the present invention, on the said insulator film preparation process of loose structure (promptly forming a plurality of holes) can for:
The first step: the colloidal sol roller coating that will comprise ceramic insulating layer material particle and easy volatile solvent is on a kind of base material;
Second step: baking then, make that the easy volatile solvent in the colloidal sol is vapored away, form a plurality of holes (promptly forming loose structure) thereby go up preparation at formed insulator film (being ceramic insulating layer material film).
In the present invention; On concrete the realization, the thickness range of said insulator film is preferably 15 ~ 60 μ m, if thickness is less than 15 μ m; Then said insulator film can not possess enough electronic isolation property; If thickness is greater than 60 μ m, then said insulator film can not possess enough ionic conductivities, thereby can't provide lithium rechargeable battery necessary ionic conduction.For the present invention, the insulation property of said insulator film will reach Mohm (megohm) rank, could guarantee the electronic isolation performance like this.
In the present invention, on concrete the realization, the integrated structure of these two kinds of electrodes of the anode of said lithium rechargeable battery and negative electrode; Can select range upon range of and winding-structure; That is to say that said lithium rechargeable battery can be lamination type electric pond and coiled battery, specifically is preferably stacked battery; Purpose is to reduce the destruction to insulator film, guarantees that the combination between the electrode such as anode and negative electrode of battery is tight.
In the present invention, on concrete the realization, can combine through the hot pressing mode of HTHP between said anode and the negative electrode, form positive electrode, insulator film and negative electrode composite construction.The temperature that said hot pressing is adopted is preferably 80 ℃; The pressure that said hot pressing is adopted is preferably 0.2MPa; The time range that said hot pressing continues can be 1 ~ 10min, and like this, the present invention both can guarantee the heat seal bond effect between said anode and the negative electrode; Improve production efficiency again, and then reduced the production cost of battery.
Need to prove that for lithium rechargeable battery provided by the invention, it can guarantee that battery at the short circuit problem that does not occur under the high temperature more than 160 ℃ between the anti-property electrode (opposing electrode), has improved battery security.Simultaneously; The manufacturing process that provides based on the invention described above; Can guarantee that the insulator film in the lithium rechargeable battery has possessed enough holes and held electrolyte, and then provide the lithium rechargeable battery operate as normal necessary ionic conductance through the electrolyte in the hole.
In addition, said anode and negative electrode combine through hot pressing mode, can guarantee that battery has excellent cycle performance so that the electrode structure of lithium ion battery is more stable.
The concrete preparation process of a kind of high security lithium ion secondary battery provided by the invention is described below by a specific embodiment.
1, selects the material step.Select the solid oxide aluminium Al of α shape 2O 3Material as ceramic insulating layer in the insulator film (need to prove said solid oxide aluminium Al 2O 3Can be the Al of α type 2O 3Al with the γ type 2O 3In at least a), said solid oxide aluminium Al 2O 3The average grain diameter of particle (being D50) scope is preferably 2 μ m ~ 10 μ m; Simultaneously, said aluminium oxide Al 2O 3The adhesive layer of particle can be solid-state polyacrylic acid glue (need to prove, both can be PP type glue, can also be solid-state Kynoar class glue, for example solid-state Kynoar PVDF) with glue.At this moment, for the present invention, said aluminium oxide Al 2O 3Mass ratio between particle and the polyacrylic acid glue can be 95:5, wherein, also comprises containing the pore-creating thing: liquid silane coupler, said silane coupler and said aluminium oxide Al 2O 3Mass ratio between the particle is 1:100;
At this moment, the material of negative electrode is chosen as oxide material of lithium, cobalt, nickel and manganese, and bonds with Kynoar PVDF.The material of anode is chosen as the Delanium material, and use base styrene butadiene rubber sbr bonding.
2, preparation battery step.The present invention may further comprise the steps in order on the surface of anode, to form insulator film:
At first, process colloidal sol with Kynoar PVDF and N-methyl pyrrolidone (NMP), requiring the solid content of said colloidal sol is 3%, is used for as subsequent use colloidal sol;
Then, aluminium oxide Al 2O 3This three's solute of particle, polyacrylic acid glue and silane coupler dissolves with solvent NMP (N-methyl pyrrolidone), and configuration formation solid content is 40% aluminium oxide Al 2O 3Colloidal sol;
Then, aluminium oxide Al 2O 3The colloidal sol roller coating is to PET base material (being PET PET polyester film), and the thickness that requires the insulator film of roller coating is 35 μ m, with 120 ℃ temperature baking, makes aluminium oxide Al then 2O 3Colloidal sol becomes gel, and lets liquid NMP volatilize, and finally on formed pellumina, forms hole, and as shown in Figure 1, said pellumina 2 is formed on said PET base material 1 surface, has a plurality of holes 3 on the said pellumina 2;
Then, as shown in Figure 2, after rolling with anode unreeling shaft 5 antianode pole pieces; The pellumina of above-mentioned formation is placed into the surface of anode, simultaneously in put procedure, with base material unreeling shaft 6 and base material Scroll 7 PET base material 1 is peeled off from pellumina and to be come; And with the subsequent use colloidal sol of lance ejection between the surface of pellumina 2 and anode 10; Form the subsequent use glue layer 4 of one deck, thereby form " composite construction " of anode material, subsequent use sol layer and pellumina, toast with 120 ℃ temperature then; Make liquid NMP volatilization, on subsequent use glue layer 4, form hole 3 equally;
Then, it is range upon range of that the anode 10 that will have a pellumina and negative electrode 20 carry out through cross layered mode, reaches the needed number of plies of manufacturer of stacked battery; As shown in Figure 3; Adopt hot pressing mode that the anode 10 that the surface has pellumina 2 is combined with negative electrode 20 then, the pressure that adopts during hot pressing is 0.2MPa, and the temperature of hot pressing is 80 ℃; Hot pressing time is 1 minute, thereby lets the surface have the bonding of heat seal firmly between anode 10 and the negative electrode 20 of pellumina 2;
At last; Put into then in the seal casinghousing (like the aluminum plastic film housing), and inject electrolyte, let negative electrode and anode and insulator film Electolyte-absorptive; The final lithium rechargeable battery that forms a kind of high security; Not only can intercept electrical conductivity between anode that it has and the negative electrode, can also carry out ionic conduction through the electrolyte in the insulator film hole simultaneously, guarantee the serviceability of lithium ion battery through insulator film.
Therefore, the technical scheme and the embodiment that provide based on the invention described above can know, the invention provides a kind of high security lithium ion secondary battery; This lithium rechargeable battery comprises seal, electrolyte, opposite polarity electrode (negative electrode, anode); Combine through cross layered or coiling between anode and the negative electrode, be filled with electrolyte between anode and the negative electrode, then pass through seal integral sealing; Draw negative electrode and anode water conservancy diversion terminal, and then form a cell body.For the present invention; Owing to not only can intercept electrical conductivity between anode and these two reversed polarity electrodes of negative electrode through insulator film; Can also carry out ionic conduction through the electrolyte in the insulator film hole, the surface of at least one has the single or multiple lift insulator film in said anode and the negative electrode simultaneously, and said insulator film can be combined closely with electrode; Thereby guaranteed that battery of the present invention in making and use, possesses enough structural stabilities.
For lithium rechargeable battery provided by the invention, the insulating bodies film that has on its anode and/or the cathode surface will possess enough porositys, is used for filling the electrolyte that ionic conduction is used.Battery manufacturing process of the present invention comprises technologies such as insulator film preparation, insulator film pore-creating and battery electrode heat seal bonding.Therefore; For the battery of the present invention's preparation, it can remove conventional plastic (polyolefin) barrier film, adopts resistant to elevated temperatures insulator film; Can avoiding at high temperature, plastic diaphragms melts the cell safety that causes; Simultaneously, owing to firmly anode and these two electrodes of negative electrode are fixed the useful life that therefore can improve lithium rechargeable battery.
In sum, compared with prior art, the invention provides a kind of high security lithium ion secondary battery; It is stable and reliable for performance, can solve electrode diaphragm and melt the battery short circuit problem that is caused, and avoids the generation of security incident; Can have good security performance, guarantee long-time normal use of lithium ion battery, prolong the useful life of lithium rechargeable battery; Thereby have market application foreground widely, be of great practical significance.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims (10)

1. a high security lithium ion secondary battery is characterized in that, includes seal casinghousing, includes anode, negative electrode and electrolyte in the said seal casinghousing;
The surface of said anode and/or negative electrode has the single or multiple lift insulator film, and said insulator film possesses loose structure.
2. lithium rechargeable battery as claimed in claim 1 is characterized in that, the material of said negative electrode comprises at least a in lithium and cobalt oxides, lithium nickel oxide, lithium manganese oxide, lithium, cobalt, nickel and manganese oxide and the lithium iron phosphate;
The material of said anode comprises at least a in graphite, hard carbon, soft carbon, silica-base material and the tin-based material.
3. lithium rechargeable battery as claimed in claim 1 is characterized in that, said insulator film is the insulator film that includes ceramic insulating layer and adhesive layer and possess loose structure.
4. lithium rechargeable battery as claimed in claim 3 is characterized in that, the material of said ceramic insulating layer is oxide ceramic material or insulative nitride material;
Said oxide ceramic material comprises at least a in aluminium oxide, titanium oxide and the silica, and said insulative nitride material is a silicon nitride.
5. lithium rechargeable battery as claimed in claim 4 is characterized in that, the particle size range of oxide ceramic material that comprises in the said ceramic insulating layer or insulative nitride material is 1 ~ 15 μ m.
6. lithium rechargeable battery as claimed in claim 3 is characterized in that, the use glue polarity that said adhesive layer adopted is for opposite with the polarity of the male or female of being fixed.
7. lithium rechargeable battery as claimed in claim 1 is characterized in that, the mode through adopting roller coating, spraying and heat seal to combine makes insulator film fix at said anode and/or cathode surface moulding.
8. lithium rechargeable battery as claimed in claim 1 is characterized in that, the thickness range of said insulator film is 15 ~ 60 μ m.
9. like each described lithium rechargeable battery in the claim 1 to 8, it is characterized in that the preparation process of said insulator film loose structure is:
The first step: the colloidal sol roller coating that will include ceramic insulating layer material particle and easy volatile solvent is on a kind of base material;
Second step: baking then, make that the easy volatile solvent in the colloidal sol is vapored away, thus formed as the ceramic insulating layer material film of insulator film on preparation form loose structure.
10. lithium rechargeable battery as claimed in claim 9 is characterized in that, said colloidal sol is aluminium oxide Al 2O 3Colloidal sol, at this moment, the material of said ceramic insulating layer is solid oxide aluminium Al 2O 3, said solid oxide aluminium Al 2O 3Al for the α type 2O 3Al with the γ type 2O 3In at least a, said solid oxide aluminium Al 2O 3Average particle size range be 2 μ m ~ 10 μ m;
Said aluminium oxide Al 2O 3It is solid-state Kynoar class or PP type glue that the adhesive layer of particle uses glue;
Said aluminium oxide Al 2O 3Mass ratio between particle and the Kynoar is 95:5;
Said aluminium oxide Al 2O 3Solute in the colloidal sol also includes silane coupler, said silane coupler and said aluminium oxide Al 2O 3Mass ratio between the particle is 1:100;
Said aluminium oxide Al 2O 3Solvent is N-methyl pyrrolidone NMP in the colloidal sol;
Said base material is the PET base material.
CN2012103372327A 2012-09-13 2012-09-13 High-safety lithium ion secondary battery Pending CN102842736A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1251215A (en) * 1997-02-28 2000-04-19 旭化成工业株式会社 Nonaqueous secondary battery and method for mfg. same
JP2005327680A (en) * 2004-05-17 2005-11-24 Matsushita Electric Ind Co Ltd Lithium ion secondary battery
CN1973389A (en) * 2004-05-14 2007-05-30 松下电器产业株式会社 Lithium-ion secondary battery and its manufacturing method
CN101055925A (en) * 2007-02-02 2007-10-17 东莞新能源电子科技有限公司 A secure lithium icon battery, improving method and making method of its anode slice
CN101932639A (en) * 2008-01-30 2010-12-29 日本瑞翁株式会社 Porous film and secondary battery electrode
CN102177604A (en) * 2008-10-10 2011-09-07 丰田自动车株式会社 Lithium secondary battery and manufacturing method thereof
CN102610830A (en) * 2012-03-26 2012-07-25 龙能科技（苏州）有限公司 Lithium ion battery
CN202996982U (en) * 2012-09-13 2013-06-12 杭州万好万家动力电池有限公司 Lithium ion secondary battery with high safety performance

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1251215A (en) * 1997-02-28 2000-04-19 旭化成工业株式会社 Nonaqueous secondary battery and method for mfg. same
CN1973389A (en) * 2004-05-14 2007-05-30 松下电器产业株式会社 Lithium-ion secondary battery and its manufacturing method
JP2005327680A (en) * 2004-05-17 2005-11-24 Matsushita Electric Ind Co Ltd Lithium ion secondary battery
CN101055925A (en) * 2007-02-02 2007-10-17 东莞新能源电子科技有限公司 A secure lithium icon battery, improving method and making method of its anode slice
CN101932639A (en) * 2008-01-30 2010-12-29 日本瑞翁株式会社 Porous film and secondary battery electrode
CN102177604A (en) * 2008-10-10 2011-09-07 丰田自动车株式会社 Lithium secondary battery and manufacturing method thereof
CN102610830A (en) * 2012-03-26 2012-07-25 龙能科技（苏州）有限公司 Lithium ion battery
CN202996982U (en) * 2012-09-13 2013-06-12 杭州万好万家动力电池有限公司 Lithium ion secondary battery with high safety performance

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Application publication date: 20121226