CN2742585Y - Novel high energy polymer lithium ion cell - Google Patents
Novel high energy polymer lithium ion cell Download PDFInfo
- Publication number
- CN2742585Y CN2742585Y CNU2004200264213U CN200420026421U CN2742585Y CN 2742585 Y CN2742585 Y CN 2742585Y CN U2004200264213 U CNU2004200264213 U CN U2004200264213U CN 200420026421 U CN200420026421 U CN 200420026421U CN 2742585 Y CN2742585 Y CN 2742585Y
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- energy polymer
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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 high energy polymer lithium ion cell, which comprises positive pole pieces, negative pole pieces and a diaphragm. The high energy polymer lithium ion cell is characterized in that the diaphragm presents a bag shape which adapts the dimensions of the pole pieces; one negative pole piece or one positive pole piece is positioned in a diaphragm bag in an appressed mode; the other negative pole piece or the other positive pole piece is tightly appressed on the outer side of the diaphragm bag; thus, a cell is formed. The utility model not only fundamentally solves the problem of the short circuit of the cell and the problem of the stability of the limiting surface of the positive negative pole or the negative pole piece and the diaphragm, but also reduces manual manipulation in the process of assembling the cell and reduces the influence on the quality of the cell caused by human factors; the mechanization level of the assembling of the cell is further enhanced, and the purposes of production efficiency enhancement and product cost reduction are achieved consequently.
Description
Technical field
The utility model relates to a kind of high-energy polymer lithium ion battery.
Background technology
At present, the main product of lithium ion battery is a liquid lithium ionic cell on the market.The relative liquid lithium ionic cell of polymer Li-ion battery has bigger energy density, thinner, littler, lighter, use advantages such as safer, particularly it can make different shape according to client's demand, has the incomparable characteristic of liquid lithium ionic cell.
1994, U.S.'s Bell Laboratory was developed first polymer Li-ion battery in the world.1999, Sony Corporation was with its commercialization.In the manufacturing process of polymer Li-ion battery, the assemble method of its pole piece heap has two kinds of methods, that is: takeup type and laminated type at present.
So-called takeup type is exactly overall dimension and the capacity according to battery request, designs the size of battery pole piece and the amount of the active material that will pack into, and positive and negative plate and the barrier film with battery is ready to then, the work of can starting shooting.Battery when reeling earlier with diaphragm case on winding needle, negative plate (or positive plate) is placed in the middle of the barrier film, positive plate (or negative plate) is placed on the barrier film, earlier negative pole (or anodal) is involved in half-turn, sends into positive pole (negative pole) sheet then.
Anodal (or negative pole) lead portion is involved in earlier, sends into after negative pole (or anodal) lead portion, and with the coated portion alignment (barrier film is between both positive and negative polarity) of positive/negative plate.Positive plate must not misplace and exceed negative plate in the winding process.Positive and negative plate all must not misplace and exceed the barrier film width.Battery is rolling-in as far as possible, and its radial dimension error must not be greater than ± 0.2mm, and the axial dimension error must not be greater than ± 0.5mm.
The shortcoming of the method is:
1, large-sized battery is not suitable for adopting takeup type.When cell height excessive (more than 100mm) or pole piece length were long, owing to require the change of specification of equipment and the lifting of precision, conventional equipment was difficult to reach the standard of above-mentioned battery request.
2, when cell thickness is lower than 2mm, the thickness that requires battery as majorities such as electronic card, electronic certificates is below 1mm, and pole piece length is too short, and this moment is with regard to inapplicable method for winding.
3, according to the basic principle of polymer Li-ion battery, it requires the positive and negative plate of battery and the triangular relative position of barrier film to align.As Fig. 1,1 represents barrier film, and 2 represent negative plate, and 3 represent positive plate.And in process of production, positive plate, negative plate and barrier film all are banded, and its length changes with the difference of battery size, and when cell widths was identical, the length of its positive plate, negative plate and barrier film increased with the thickness of battery.In winding process, a sideslip is arranged among the three, or have a material deformation or equipment Tension Control inhomogeneous etc., just may cause directly contact and being short-circuited of positive and negative plate.The length of positive plate, negative plate and barrier film is long more, the relative position of positive plate, negative plate and barrier film is difficult aligning more just, and add material this has the characteristics etc. of distortion under stressing conditions, causes the variation of battery winding elasticity inhomogeneous, the difficulty of reeling is just big more, and percent defective is high more.For avoiding this phenomenon to take place, make the 0.5mm---2.0mm of the width of barrier film usually greater than the positive and negative plate width.But this still can't resolve root problem.
With 063048 type battery is example, its positive plate: 425mm*40mm; Negative plate: 392mm*41mm; Barrier film: 865mm*43mm.Flat volume pin size: wide 22.4mm, biplate thickness is about about 0.8mm.About the about 560mm of average length of positive plate, negative plate and three kinds of materials of barrier film, roll up 12 circles.Multireel one circle, three kinds of materials are with regard to many touch opportunities, and electric core is with regard to many first short circuits chance.And volume has formed the thick shape in intermediate thin both sides again after pin takes away.
So-called laminated type can be subdivided into it collapsible (superimposed lamella) and monocell (bi-cell) formula two classes.
Collapsible, be exactly overall dimension and capacity according to battery request, design the length of barrier film and size and single two-sided number of plies of positive and negative plate.Then barrier film is lain on the workbench, the positive plate of putting a double spread active material earlier is on barrier film, and positive plate is apart from the about 28mm of barrier film minor face, and distance about 0.2mm---1.0mm parallel with lower limb on the barrier film to positive plate, flattens the long edge break of barrier film; On barrier film, put the negative plate of a double spread active material again, align, the barrier film on long limit is folded on the negative plate leveling with following positive plate.So operation is until using up required positive and negative electrode pole piece.The shortcoming of the method is:
1, manual operations is too many, is difficult to realize mechanization, and production efficiency is low.
2, be astable the contact between diaphragm paper and the electrode slice.
3, still there is the phenomenon that contacts short circuit because of the positive and negative electrode pole piece, do not solve root problem.
The monocell formula is exactly overall dimension and the capacity according to battery request, designs the size and the quantity of cell, they is combined again.Concrete operations are: size has in accordance with regulations been cut out positive and negative plate and barrier film, to be the intermediate layer with the negative plate then, one deck barrier film be respectively put on the two sides, and (also have with the positive plate is the intermediate layer to put positive plate on the barrier film again, one deck barrier film is respectively put on the two sides, puts negative plate on the barrier film again).Then they are placed on hot pressing on the hot-rolling press, the pole piece of making like this heap is monocell (bi-cell).
The shortcoming of the method is:
1, will be with whole positive and negative electrode pole piece and barrier film, be cut into a fritter one fritter, lamination again, hot pressing, not only increased workload, and owing to the barrier film exposed parts increases, in the course of processing of later process, increase the chance of falling the limit arrisdefect, promptly increased the directly chance of contact of both positive and negative polarity pole piece.In lamination, hot pressing, also there is the contraposition problem, promptly still there is the short circuit problem that directly contacts because of the both positive and negative polarity pole piece.
2, owing to increased the workload of stamping-out, hot pressing, increased manufacturing cost.
3, manual operations is too many, is difficult for realizing continuous productive process.
Summary of the invention
The objective of the invention is: provide a kind of and avoid the direct contact of battery plus-negative plate pole piece to cause short circuit, enhance productivity, improve the new construction high-energy polymer lithium ion battery of battery quality.
The concrete structure improvement project that realizes above-mentioned purpose is as follows:
1, novel high-energy polymer Li-ion battery comprises positive plate, negative plate and barrier film, it is characterized in that:
A, described barrier film are the bag shape that adapts with the pole piece size;
B, a negative plate or positive level sheet fit tightly and are arranged in diaphragm bag, and another positive plate or negative plate fit tightly the outside at diaphragm bag; Rearrange battery according to this.
2, according to above-mentioned 1 described novel high-energy polymer Li-ion battery, it is characterized in that: a negative plate fits tightly and is arranged in diaphragm bag, and a positive plate fits tightly the outside at diaphragm bag, forms the negative pole monocell.
3, according to above-mentioned 1 described novel high-energy polymer Li-ion battery, it is characterized in that: a negative plate fits tightly and is arranged in the barrier film paper bag, and two positive plates fit tightly two outsides at diaphragm bag respectively, forms the negative pole double cell.
4, according to above-mentioned 1 described novel high-energy polymer Li-ion battery, it is characterized in that: a positive plate fits tightly and is arranged in diaphragm bag, and a negative plate fits tightly the outside at diaphragm bag, forms anodal monocell.
5, according to above-mentioned 1 described novel high-energy polymer Li-ion battery, it is characterized in that: a positive plate fits tightly and is arranged in diaphragm bag, and two negative plates fit tightly two outsides at diaphragm bag respectively, form anodal double cell.
6, according to above-mentioned 2 and 3 described novel high-energy polymer Li-ion batteries, it is characterized in that: form battery by an above negative pole monocell and an above negative pole double cell.
7, according to above-mentioned 4 and 5 described novel high-energy polymer Li-ion batteries, it is characterized in that: by anodal monocell more than and more than one anodal double cell form battery.
8, according to the described novel high polymer lithium ion battery of above-mentioned 1-8, it is characterized in that: on the described barrier film paper adhesive-layer is arranged.
Useful technique effect of the present invention is embodied in several aspects:
1, the present invention is coated with one deck viscose glue with membrane surface, system pouch diaphragm bag, then positive plate or negative plate are put into bag, make electrode slice and diaphragm paper surface combination firm through the press pressing, fundamentally solved the astable contact problems between barrier film and the electrode slice, made lithium ion the shortest by the distance of electrode slice and barrier film.
2, because positive plate or negative plate are to be placed in the pocket that barrier film makes, there are not exposed positive plate or negative plate, thereby do not have direct a contact between positive plate and the negative plate, fundamentally solved battery because of the direct short circuit problem that causes of contact of positive and negative electrode pole piece.
3, adopt the present invention also to reduce the manual operations of battery pack process of assembling, reduced the influence of human factor, further improved the mechanization level of battery assembling, thereby reached the purpose of enhancing productivity, reduce product cost battery quality.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is a STRUCTURE DECOMPOSITION schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described by embodiment.
Embodiment 1:
The barrier film system pouch 3 that the surface is had adhesive-layer, to put into diaphragm bag by the negative plate 1 that carbon one graphite material, adhesive, additive are made, after the press pressure, negative plate 1 is formed one with diaphragm bag 3, add a positive plate 2 in diaphragm bag 3 outsides and promptly form the negative pole monocell: both sides respectively add a positive plate 2 and promptly form the negative pole double cell outside diaphragm bag 3, see Fig. 1, Fig. 2.
The negative pole monocell: with 063048 type battery is example, its negative plate size 27mm * 41mm, positive plate size 27mm * 40mm, diaphragm bag size 28.5mm * 42.5mm.8 negative pole monocells and negative pole double cell are piled up, again through soldering polar ear, go into aluminium plastic packaging bag, annotate electrolyte, edge sealing, change into, detect partial volume, the finished product warehouse-in stores, promptly finish 063048 type battery and manufacture.
Embodiment 2:
The barrier film system pouch that the surface is had adhesive-layer, will be by cobalt acid lithium or LiMn2O4, lithium nickelate, LiFePO4 and compound thereof, adhesive, the positive plate that conductive agent etc. are made is put into diaphragm bag, after the press pressure, positive plate and diaphragm bag fuse, and add a negative plate in the diaphragm bag outside and promptly form anodal monocell; Both sides respectively add a negative plate and promptly form anodal double cell outside diaphragm bag.
Anodal monocell: with 063048 type battery is example, its positive plate size 27mm * 40mm, negative plate size 27mm * 41mm, diaphragm bag size 28.5mm * 42.5mm.The anodal double cell of 8 anodal monocells and one is piled up, again through soldering polar ear, go into aluminium plastic packaging bag, annotate electrolyte, edge sealing, change into, detect partial volume, the finished product warehouse-in stores, promptly finish 063048 type battery and manufacture.
Claims (10)
1, novel high-energy polymer Li-ion battery comprises positive plate, negative plate and diaphragm paper, it is characterized in that:
A, described barrier film are the bag shape that adapts with the pole piece size;
B, a negative plate or positive level sheet fit tightly and are arranged in diaphragm bag, and another positive plate or negative plate fit tightly the outside at diaphragm bag; Rearrange battery according to this.
2, novel high-energy polymer Li-ion battery according to claim 1 is characterized in that: a negative plate fits tightly and is arranged in diaphragm bag, and a positive plate fits tightly the outside at diaphragm bag, forms the negative pole monocell.
3, novel high-energy polymer Li-ion battery according to claim 1 is characterized in that: a negative plate fits tightly and is arranged in diaphragm bag, and two positive plates fit tightly two outsides at diaphragm bag respectively, forms the negative pole double cell.
4, novel high-energy polymer Li-ion battery according to claim 1 is characterized in that: a positive plate fits tightly and is arranged in diaphragm bag, and a negative plate fits tightly the outside at diaphragm bag, forms anodal monocell.
5, novel high-energy polymer Li-ion battery according to claim 1 is characterized in that: a positive plate fits tightly and is arranged in diaphragm bag, and two negative plates fit tightly two outsides at diaphragm bag respectively, form anodal double cell.
6, novel high-energy polymer Li-ion battery according to claim 2 is characterized in that: form battery by an above negative pole monocell and an above negative pole double cell.
7, novel high-energy polymer Li-ion battery according to claim 3 is characterized in that: form battery by an above negative pole monocell and an above negative pole double cell.
8, novel high-energy polymer Li-ion battery according to claim 4 is characterized in that: by anodal monocell more than and more than one anodal double cell form battery.
9, novel high-energy polymer Li-ion battery according to claim 5 is characterized in that: by anodal monocell more than and more than one anodal double cell form battery.
10, novel high-energy polymer Li-ion battery according to claim 1 is characterized in that: on the described barrier film face adhesive-layer is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200264213U CN2742585Y (en) | 2004-04-17 | 2004-04-17 | Novel high energy polymer lithium ion cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200264213U CN2742585Y (en) | 2004-04-17 | 2004-04-17 | Novel high energy polymer lithium ion cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2742585Y true CN2742585Y (en) | 2005-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200264213U Expired - Fee Related CN2742585Y (en) | 2004-04-17 | 2004-04-17 | Novel high energy polymer lithium ion cell |
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| CN (1) | CN2742585Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8007935B2 (en) | 2006-10-30 | 2011-08-30 | Byd Co., Ltd. | Plate assembly, core and lithium ion battery |
| US8092936B2 (en) | 2007-12-25 | 2012-01-10 | Byd Co. Ltd. | Electrochemical cell having a coiled core |
| US8178230B2 (en) | 2007-12-18 | 2012-05-15 | Byd Co., Ltd. | Battery pack |
| US8178225B2 (en) | 2007-11-29 | 2012-05-15 | Byd Co., Ltd. | Battery and preparation method thereof |
| US8193770B2 (en) | 2007-12-25 | 2012-06-05 | BYD Co. Ltd | Battery system for a vehicle having an over-current/over-temperature protective feature |
| US8276695B2 (en) | 2007-12-25 | 2012-10-02 | Byd Co. Ltd. | Battery electrode sheet |
| CN102891290A (en) * | 2012-07-05 | 2013-01-23 | 深圳市海太阳实业有限公司 | Silicon carbon composite material, lithium ion battery and negative pole piece thereof |
| CN114614104A (en) * | 2022-03-23 | 2022-06-10 | 上海兰钧新能源科技有限公司 | Lamination method and lithium battery |
-
2004
- 2004-04-17 CN CNU2004200264213U patent/CN2742585Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8007935B2 (en) | 2006-10-30 | 2011-08-30 | Byd Co., Ltd. | Plate assembly, core and lithium ion battery |
| US8178225B2 (en) | 2007-11-29 | 2012-05-15 | Byd Co., Ltd. | Battery and preparation method thereof |
| US8178230B2 (en) | 2007-12-18 | 2012-05-15 | Byd Co., Ltd. | Battery pack |
| US8092936B2 (en) | 2007-12-25 | 2012-01-10 | Byd Co. Ltd. | Electrochemical cell having a coiled core |
| US8193770B2 (en) | 2007-12-25 | 2012-06-05 | BYD Co. Ltd | Battery system for a vehicle having an over-current/over-temperature protective feature |
| US8202644B2 (en) | 2007-12-25 | 2012-06-19 | Byd Co. Ltd. | Protection cover for an end cap assembly of a battery cell |
| US8276695B2 (en) | 2007-12-25 | 2012-10-02 | Byd Co. Ltd. | Battery electrode sheet |
| US8383257B2 (en) | 2007-12-25 | 2013-02-26 | Byd Co. Ltd. | Electrochemical storage cell with blow out vents |
| US8865335B2 (en) | 2007-12-25 | 2014-10-21 | Byd Co. Ltd. | Electrochemical storage cell |
| CN102891290A (en) * | 2012-07-05 | 2013-01-23 | 深圳市海太阳实业有限公司 | Silicon carbon composite material, lithium ion battery and negative pole piece thereof |
| CN102891290B (en) * | 2012-07-05 | 2015-07-22 | 深圳市海太阳实业有限公司 | Silicon carbon composite material, lithium ion battery and negative pole piece thereof |
| CN114614104A (en) * | 2022-03-23 | 2022-06-10 | 上海兰钧新能源科技有限公司 | Lamination method and lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |