CN201285773Y - Diaphragm composite membrane for lithium ionic secondary battery - Google Patents
Diaphragm composite membrane for lithium ionic secondary battery Download PDFInfo
- Publication number
- CN201285773Y CN201285773Y CNU2008201386644U CN200820138664U CN201285773Y CN 201285773 Y CN201285773 Y CN 201285773Y CN U2008201386644 U CNU2008201386644 U CN U2008201386644U CN 200820138664 U CN200820138664 U CN 200820138664U CN 201285773 Y CN201285773 Y CN 201285773Y
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- film
- lithium ion
- membrane
- secondary battery
- ion secondary
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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 utility model relates to a lithium ion secondary battery diaphragm complex film which is a polyimide (PI) modified film covered in the original lithium ion secondary battery diaphragm arranged between lithium ion battery secondary pole pieces. The complex film can improve the safety performance of lithium ion batteries, such as the overcharging performance, the overcurrent performance, the heating (at the temperature of not less than 150 DEG C) test performance, the extrusion test performance, the pinprick test performance, the falling off performance, and the like, so that the lithium ion batteries do not burn and explode in the using process, thereby the complex film provides safety control for the lithium ion batteries commercially used for high-power equipment or transportation tools.
Description
Technical field
The utility model relates to a kind of as the power lithium-ion rechargeable battery of means of transportation use or the power-type secondary lithium battery that uses as equipment such as electric tools.Be particularly related to a kind of lithium ion battery separator composite membrane that between lithium ion battery two pole pieces, covers polyimides (PI) Modified Membrane in original lithium ion battery separator.
Background technology
At present, known secondary lithium battery barrier film all adopts the lithium ion battery of individual layer PE or PP barrier film or compound PP/PE/PP barrier film, its fail safe can't guarantee, especially at digital equipment or powerful devices such as notebook computers or when transporting industrial application, face potential safety hazards such as burning, blast, overcharge, overcurrent, heating, the potential safety hazard of being brought such as push, fall but also exist.
CN200610000611.1 discloses a kind of " battery diaphragm and preparation method thereof and the lithium rechargeable battery that contains this barrier film ".Its purpose provides battery diaphragm that a kind of mechanical strength is good, heat resistance is good and preparation method thereof and lithium rechargeable battery.Its technical scheme: battery diaphragm comprises base material and the hole that is distributed on the base material, and wherein, described base material contains polyimides.The preparation method of battery diaphragm comprises and will contain the solution film forming of base material, pore-forming material and solvent, and removes the pore-forming material under the substrate glass temperature being lower than.Its weak point is: add the pore-forming material by preceding operation in its preparation method, back operation is removed the way of pore-forming material and is made pore membrane, makes complex process to cause the product cost height, is difficult to commercial applications.
The utility model content
The purpose of this utility model is to overcome the weak point in the above-mentioned known technology, a kind of lamination layer structure that covers one deck polyimides (PI) Modified Membrane on original lithium ion battery separator is provided, the over-charging of lithium ion battery will greatly be promoted, the overcurrent performance, heating properties (〉=150 ℃), extrusion performance, the security performance of lithium ion batteries such as drop performance, make lithium ion battery in use not burn, do not explode, for the lithium ion secondary battery membrane compound film that safety guarantee is provided is used in the commercialization of lithium ion battery on powerful device or means of transportation.
The purpose of this utility model can reach by following measure:
This lithium ion secondary battery membrane compound film comprises two pole pieces of lithium ion battery, and its special character is: the lithium ion battery separator between described lithium ion battery two pole pieces is the lamination layer structure of polyimides (PI) film and common diaphragm.
Described common diaphragm is a kind of or several composite constructions of PE film, PP film, PE film and PP film.
Described lamination layer structure by polyimides (PI) film, each self film of common diaphragm after superimposed structure of composite membrane.
Described structure of composite membrane is made up of superimposed composite bed after being located in polyimides (PI) film between the two-layer common diaphragm and each self film.
Described structure of composite membrane is made up of superimposed composite bed after being located in common diaphragm between two layers of polyimide (PI) film and each self film.
The multiple layer polymer membrane structure that described lamination layer structure is composited by polyimides (PI) film and common diaphragm.
Described polyimides (PI) film is provided with the micropore of some apertures 〉=5 nanometers, and voidage is greater than 25%.
The purpose of this utility model can also reach by following measure:
This lithium ion secondary battery membrane compound film, comprise two pole pieces of lithium ion battery, its special character is: the lithium ion battery separator between described lithium ion battery two pole pieces is the perforated membrane of porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=200 ℃ and the lamination layer structure of common diaphragm.
Described common diaphragm is a kind of or several composite constructions of PE film, PP film, PE film and PP film.
Described lamination layer structure by the perforated membrane of porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=200 ℃, each self film of common diaphragm after superimposed structure of composite membrane.
Described structure of composite membrane by the perforated membrane that is located in porosity 〉=25% between the two-layer common diaphragm, aperture 〉=5 nanometers, melt temperature 〉=200 ℃ and each self film after superimposed composite bed form.
Described structure of composite membrane two-layerly is made up of superimposed composite bed behind the common diaphragm between porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes and each self film respectively by being located in.
The utility model is compared known technology, has following good effect:
1, over-charging: electric current 〉=10C
5(A) during voltage 〉=10V, lithium ion two batteries are overcharged, lithium ion battery does not burn, does not explode.
2, heating properties: lithium ion battery exists〉heating and keeping more than 2 hours under 150 ℃ the temperature, lithium ion battery does not burn, does not explode.
Description of drawings
Fig. 1 is a lithium ion secondary battery membrane compound film structural representation of the present utility model.
Fig. 2 is Fig. 1 composite membrane by superimposed structure of composite membrane schematic diagram behind polyimides (PI) film or the perforated membrane that is made of porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=2000C, each self film of individual layer (PE) barrier film.
Fig. 3 be Fig. 1 composite membrane by be located between the two-layer common diaphragm polyimides (PI) film or by superimposed structure of composite membrane schematic diagram behind porosity 〉=25%, aperture 〉=5 nanometers, compound each self film of the melt temperature 〉=200 ℃ perforated membrane that constitutes.
Fig. 4 is Fig. 1 composite membrane by being located in two layers of polyimide (PI) film or by superimposed structure of composite membrane schematic diagram behind compound each self film of common diaphragm between porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes.
Fig. 5 is Fig. 1 composite membrane by polyimides (PI) film or by the structural representation of the synthetic polymeric membrane of porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes and individual layer common diaphragm.
Fig. 6 is that Fig. 1 composite membrane is by the multi-layer polymer film structural representation that is located in polyimides (PI) film between the two-layer common diaphragm or is composited by porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes.
Fig. 7 is that Fig. 1 composite membrane is by being located in two layers of polyimide (PI) film or the two-layer multi-layer polymer film structural representation that is composited by the common diaphragm between porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes.
Fig. 8 is the micropore schematic diagram of Fig. 1 composite membrane.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
See also shown in Figure 1ly, the structure of this lithium ion secondary battery membrane compound film is: cover between electrodes of lithium-ion batteries 1, pole piece 2 by polyimides (PI) film 51 or the lamination layer structure 5 that is made of porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51 and common diaphragm 52.Described polyimides (PI) the 51st, main chain contain imide group (polymer C-N-C-).
See also shown in Figure 2ly, described structure of composite membrane 5 is by polyimides (PI) film 51 or by superimposed lamination layer structure behind porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51, individual layer common diaphragm 52 each self film.
See also shown in Figure 3ly, described structure of composite membrane 5 is by being located in polyimides (PI) film 51 between the two-layer common diaphragm 52 or being made up of superimposed composite bed behind porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51 and each self film.
See also shown in Figure 4ly, described structure of composite membrane 5 is by being located in two layers of polyimide (PI) 51 films or being made up of superimposed composite bed behind the common diaphragm 52 between porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51 and each self film.
See also shown in Figure 5ly, described lamination layer structure 5 is by polyimides (PI) film 51 or the multiple layer polymer membrane structure that is composited by porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51 and individual layer common diaphragm 52.
See also shown in Figure 6ly, described lamination layer structure 5 is by the multiple layer polymer membrane structure that is located in polyimides (PI) film 51 between the two-layer common diaphragm 52 or is composited by porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51.
See also shown in Figure 7ly, described lamination layer structure 5 is by the multiple layer polymer membrane structure that is located in two layers of polyimide (PI) film 51 or is composited by the common diaphragm 52 between porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51.
See also shown in Figure 8, described polyimides (PI) film or be provided with the micropore of some 5 nanometers～50 microns, and voidage is greater than 25% by porosity 〉=25%, aperture 〉=5 nanometers, the melt temperature 〉=200 ℃ perforated membrane that constitutes 51.
The preparation method: the presoma and the solvent of the perforated membrane 51 that constitutes with polyimides (PI) 51 or by porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=2000C are reacted into oligomer solution, to become perforated membrane after this oligomer solution film forming or the spinning then, and change into polyimides (PI) film 51 under 200 ℃ or contain the perforated membrane of polyimides (PI) composition.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim scope change and modify, and all should belong to the covering scope of the utility model claim.
Claims (12)
1, a kind of lithium ion secondary battery membrane compound film comprises two pole pieces of lithium ion battery, and it is characterized in that: the lithium ion battery separator between described lithium ion battery two pole pieces is the lamination layer structure of polyimides (PI) film and common diaphragm.
2, lithium ion secondary battery membrane compound film according to claim 1 is characterized in that: described common diaphragm is a kind of or several composite constructions of PE film, PP film, PE film and PP film.
3, lithium ion secondary battery membrane compound film according to claim 1 is characterized in that: described lamination layer structure by polyimides (PI) film, each self film of common diaphragm after superimposed structure of composite membrane.
4, lithium ion secondary battery membrane compound film according to claim 3 is characterized in that: described structure of composite membrane is made up of superimposed composite bed after being located in polyimides (PI) film between the two-layer common diaphragm and each self film.
5, lithium ion secondary battery membrane compound film according to claim 3 is characterized in that: described structure of composite membrane is made up of superimposed composite bed after being located in common diaphragm between two layers of polyimide (PI) film and each self film.
6, lithium ion secondary battery membrane compound film according to claim 1 is characterized in that: the multiple layer polymer membrane structure that described lamination layer structure is composited by polyimides (PI) film and common diaphragm.
7, according to the described lithium ion secondary battery membrane compound film of claim 1～6, it is characterized in that: described polyimides (PI) film is provided with the micropore of some apertures 〉=5 nanometers, and voidage is greater than 25%.
8, a kind of lithium ion secondary battery membrane compound film comprises two pole pieces of lithium ion battery, and it is characterized in that: the lithium ion battery separator between described lithium ion battery two pole pieces is porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=200
0The perforated membrane of C and the lamination layer structure of common diaphragm.
9, lithium ion secondary battery membrane compound film according to claim 8 is characterized in that: described common diaphragm is a kind of or several composite constructions of PE film, PP film, PE film and PP film.
10, lithium ion secondary battery membrane compound film according to claim 8 is characterized in that: described lamination layer structure is by porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=200
0Superimposed structure of composite membrane behind the perforated membrane of C, each self film of common diaphragm.
11, lithium ion secondary battery membrane compound film according to claim 10 is characterized in that: described structure of composite membrane is by porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=200 that are located between the two-layer common diaphragm
0Composite bed superimposed behind the perforated membrane of C and each self film is formed.
12, lithium ion secondary battery membrane compound film according to claim 10 is characterized in that: described structure of composite membrane is two-layer respectively by porosity 〉=25%, aperture 〉=5 nanometers, melt temperature 〉=200 by being located in
0Composite bed superimposed behind common diaphragm between the perforated membrane that C constitutes and each self film is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201386644U CN201285773Y (en) | 2008-06-13 | 2008-10-31 | Diaphragm composite membrane for lithium ionic secondary battery |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820094656 | 2008-06-13 | ||
| CN200820094656.4 | 2008-06-13 | ||
| CNU2008201386644U CN201285773Y (en) | 2008-06-13 | 2008-10-31 | Diaphragm composite membrane for lithium ionic secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201285773Y true CN201285773Y (en) | 2009-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201386644U Expired - Fee Related CN201285773Y (en) | 2008-06-13 | 2008-10-31 | Diaphragm composite membrane for lithium ionic secondary battery |
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| Country | Link |
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| CN (1) | CN201285773Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114361708A (en) * | 2022-01-05 | 2022-04-15 | 池州精研新能源科技有限公司 | Environment-friendly water-based battery and preparation method thereof |
-
2008
- 2008-10-31 CN CNU2008201386644U patent/CN201285773Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114361708A (en) * | 2022-01-05 | 2022-04-15 | 池州精研新能源科技有限公司 | Environment-friendly water-based battery and preparation method thereof |
| CN114361708B (en) * | 2022-01-05 | 2022-08-19 | 池州精研新能源科技有限公司 | Environment-friendly water-based battery and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20131031 |