CN2541956Y - Lithium cell with improved packing structure - Google Patents
Lithium cell with improved packing structure Download PDFInfo
- Publication number
- CN2541956Y CN2541956Y CN02216926U CN02216926U CN2541956Y CN 2541956 Y CN2541956 Y CN 2541956Y CN 02216926 U CN02216926 U CN 02216926U CN 02216926 U CN02216926 U CN 02216926U CN 2541956 Y CN2541956 Y CN 2541956Y
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- China
- Prior art keywords
- lithium battery
- polymer
- battery
- layer
- battery core
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- Y02E60/122—
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Abstract
The utility model discloses a lithium battery in an improved packing structure, and comprises a lithium battery core, an ordinary composite material packing layer, and polymer absorbent films. The utility model is characterized in that at least one polymer absorbent film is respectively arranged on the surfaces of an upper and a lower sides of the lithium battery core, the ordinary composite material packing layer is then respectively adhered to the outside face of an upper and a lower polymer absorbent films, because the polymer absorbent film is provided with extremely strong absorbent capacity, the water in the battery core can be effectively removed, and the composite packing material is only adopted when in packing, the unique composite packing material which has the characteristics that the production technology is complicated, and when the bulk of the lithium battery core is larger, the internal water cannot be completely and evenly absorbed, and the sealing property is not ideal does not need to be adopted. Finally, the water in the battery can be evenly absorbed, and the purposes that the internal impurities of the battery are removed, the battery performance is enhanced, and the service life of the battery is extended are achieved.
Description
Technical field
The utility model relates to the lithium battery that is used for portable type electronic product, more specifically refers to a kind of lithium battery that improves encapsulating structure.
Background technology
The rechargeable type lithium battery be a kind of have high-energy-density, high voltage, in light weight, volume is little and obtain the battery of large-scale application in the portable type electronic product field.Its negative pole contains elemental lithium, but exists with metal, alloy or embedding lithium and the material with carbon element or the compound form that take off lithium respectively according to variety classes.But positive pole is generally embedding lithium and the transition metal oxide that takes off lithium.Also comprise nonaqueous electrolyte in addition, barrier film and positive and negative collector body with lithium ion conductive.The rechargeable type lithium battery is usually all very responsive to oxygen in the environment and moisture content, in other words, keep the high-performance of rechargeable type lithium battery, oxygen, moisture content and the corrosive substance in itself and the environment must be completely cut off.
Rechargeable type lithium battery encapsulating structure can be divided into two classes substantially at present: metal shell encapsulation and flexible composite encapsulation reach the purpose isolated with extraneous air by sealing.The metal shell encapsulation generally all adopts stainless steel or other metal or alloy to make difform container, has very high mechanical strength.The flexible composite encapsulation generally all encapsulates by vacuum seal with the common composite encapsulating material of containing metal paper tinsel.The main packaged type of this two class all can solve the isolated problem of oxygen and moisture content in battery and the external environment condition preferably, but these modes all the manufacture process requirement to battery is very high without exception, most of manufacture processes all need carry out under the environment of anhydrous and oxygen-free.In order to address the above problem, have a kind of composite encapsulating material of uniqueness to be used for the encapsulation of lithium battery, one deck water absorbing agent is contained in the inboard of the encapsulating material of this uniqueness, it can effectively absorb inside battery residual and follow-up side reaction process in the moisture that generates.But the production technology of this composite encapsulating material is comparatively complicated again, invest bigger, secondly, because this encapsulating material only closely contacts with the battery both sides, the moisture of inside can not be absorbed fully equably when the battery volume is big, once more, when adopting this composite encapsulating material, especially the position sealing effectiveness that stretches out of battery lead is not very good for its sealing property.
Summary of the invention
At the above-mentioned problems in the prior art, the purpose of this utility model provides a kind of lithium battery that improves encapsulating structure, complicated strict technology when carrying out the water absorbing agent processing to simplify common composite encapsulating material, the moisture of inside battery can be absorbed equably, remove inside battery impurity thereby reach, improve the purpose of battery performance and extending battery life.
To achieve these goals, lithium battery of the present utility model comprises lithium battery core, common composite material encapsulated layer, polymer suction rete, the both side surface up and down of lithium battery core is put one layer of polymeric suction rete at least respectively, and common composite material encapsulated layer adheres on polymer suction rete lateral surface up and down respectively again.
The utility model has been put one layer of polymeric suction rete at least respectively in the both side surface up and down of lithium battery core, because this polymer suction rete has very strong water absorbing capacity, it can remove the moisture content of battery inside effectively, therefore, when encapsulation, need only and adopt common composite encapsulating material, and need not adopt complex manufacturing and when the lithium battery core volume was big, the moisture content in it can not be absorbed and the unfavorable unique composite encapsulating material of sealing fully equably.The moisture of inside battery can be absorbed equably, remove inside battery impurity, improve the purpose of battery performance and extending battery life thereby reach.
Description of drawings
Fig. 1 is the lithium battery schematic diagram of conventional package structure.
Fig. 2 is an embodiment schematic cross-section of the utility model lithium battery.
Fig. 3 is another embodiment schematic cross-section of the utility model lithium battery.
Embodiment
Ask for an interview shown in Figure 1ly, in the figure, 101 is common composite encapsulating material, and 102 is battery, and 103 is electrolyte, and 104 is battery lead.
See also shown in Figure 2, the lithium battery of improvement encapsulating structure of the present utility model comprises lithium battery core 102, common composite material encapsulated layer 101, polymer suction rete 105, the both side surface up and down of lithium battery core 102 is put one layer of polymeric suction rete 105 at least respectively, and common composite material encapsulated layer 101 adheres on polymer suction rete 105 lateral surfaces up and down respectively again.
Please continue to consult shown in Figure 3, described lithium battery core 102 also can be made of the parallel connection of several piece cell pellet, described polymer suction rete 105 comprises several layers, cell pellet and stacked the putting of polymer suction rete 105 walls, in this Fig. 3, polymer suction rete 105 has five layers, and battery 102 contains four cell pellets.The top layer and the bottom are polymer water accepting layer 105, put common composite material encapsulated layer 101 respectively at top layer polymer water accepting layer 105 and bottom polymer water accepting layer 105 lateral surfaces.
The flat shape of described polymer suction rete 105 is identical or similar with the flat shape of lithium battery core 102.
The thickness of described polymer suction rete 105 is between the 2-50 micron.The best value of thickness of polymer suction rete is between the 5-10 micron.
Absorbing membrane in the above-mentioned polymer suction rete can be starch graft copolymer, cellulose graft copolymer, polyacrylic acid, polyacrylamide etc.
The preparation of this polymer is different because of kinds of materials, can adopt Raolical polymerizable as polyacrylic acid, and the water absorbent polymer water absorption rate that makes reaches 300-1000 doubly.The manufacture method of the water absurbing polymer of and for example a kind of unsaturated vinyl monomer or starch-grafted unsaturated vinyl monomer is with unsaturated vinyl monomer and alkali metal hydroxide, starch is raw material, water is solvent, use a kind of water miscible peroxide catalyst or a kind of water miscible oxidation reduction catalyst, by change starch and unsaturated vinyl monomer consumption recently make unsaturated vinyl monomer homopolymers or with the graft copolymer of starch.The water absorbent polymer water absorption rate that makes reaches 500-1300 doubly.
Claims (5)
1, a kind of lithium battery that improves encapsulating structure, it is characterized in that: this lithium battery comprises lithium battery core, common composite material encapsulated layer, polymer suction rete, the both side surface up and down of lithium battery core is put one layer of polymeric suction rete at least respectively, and common composite material encapsulated layer adheres on polymer suction rete lateral surface up and down respectively again.
2, the lithium battery of improvement encapsulating structure as claimed in claim 1, it is characterized in that: described lithium battery core is made of the parallel connection of several piece cell pellet, described polymer suction rete comprises several layers, cell pellet and stacked the putting of polymer absorbing membrane interlayer interlayer, top layer and bottom are the polymer water accepting layer, put common composite material encapsulated layer respectively at top layer polymer water accepting layer and bottom polymer water accepting layer lateral surface.
3, the lithium battery of improvement encapsulating structure as claimed in claim 1 or 2 is characterized in that: the flat shape of described polymer suction rete is identical with the flat shape of battery.
4, the lithium battery of improvement encapsulating structure as claimed in claim 1 or 2 is characterized in that: the thickness of described polymer suction rete is between the 2-50 micron.
5, the lithium battery of improvement encapsulating structure as claimed in claim 4 is characterized in that: the best value of thickness of described polymer suction rete is between the 5-10 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02216926U CN2541956Y (en) | 2002-04-19 | 2002-04-19 | Lithium cell with improved packing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02216926U CN2541956Y (en) | 2002-04-19 | 2002-04-19 | Lithium cell with improved packing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2541956Y true CN2541956Y (en) | 2003-03-26 |
Family
ID=33695838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02216926U Expired - Fee Related CN2541956Y (en) | 2002-04-19 | 2002-04-19 | Lithium cell with improved packing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2541956Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924248A (en) * | 2010-08-23 | 2010-12-22 | 东莞新能源科技有限公司 | Packaging method of soft-package lithium ion battery |
| CN102456913A (en) * | 2010-12-31 | 2012-05-16 | 深圳市海盈科技有限公司 | Lithium ion secondary battery with water-absorbing film and manufacturing method thereof |
-
2002
- 2002-04-19 CN CN02216926U patent/CN2541956Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924248A (en) * | 2010-08-23 | 2010-12-22 | 东莞新能源科技有限公司 | Packaging method of soft-package lithium ion battery |
| CN101924248B (en) * | 2010-08-23 | 2013-02-27 | 东莞新能源科技有限公司 | Packaging method of soft-package lithium ion battery |
| CN102456913A (en) * | 2010-12-31 | 2012-05-16 | 深圳市海盈科技有限公司 | Lithium ion secondary battery with water-absorbing film and manufacturing method thereof |
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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 |