CN101017916A - A highly secure lithium ion battery with the protection film in the separation film - Google Patents
A highly secure lithium ion battery with the protection film in the separation film Download PDFInfo
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- CN101017916A CN101017916A CNA2007100569084A CN200710056908A CN101017916A CN 101017916 A CN101017916 A CN 101017916A CN A2007100569084 A CNA2007100569084 A CN A2007100569084A CN 200710056908 A CN200710056908 A CN 200710056908A CN 101017916 A CN101017916 A CN 101017916A
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- barrier film
- lithium ion
- ion battery
- glued membrane
- highly secure
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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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Abstract
The disclosed high-safe Li-ion cell with protective film on membrane comprises: an anode, a cathode, a membrane between two poles, the electrolyte, and a shell. Wherein, it sets 10-30 mu m adhesive tape or film on the membrane edge of electrode startup and end; the adhesive film is polymeric film or hot-pressed acrylic PP film, and is polymerized by light polymerization or hot polymerization at temperature not over 90deg. This invention improves membrane strength and thereby the cell safety.
Description
Technical field
The present invention relates to a kind of battery, especially relate to a kind of lithium ion battery.
Background technology
Lithium ion battery because have high-energy-density, high working voltage, non-environmental-pollution, advantage such as have extended cycle life, and be widely used in portable communication apparatus and portable electric appts.The security performance of lithium ion battery is paid close attention to by people always, but the expansion owing to pole piece makes internal pressure become big behind the lithium ion cell charging, and inappreciable defective is exaggerated and becomes abnormally dangerous thereby make originally, can cause blast when serious.Barrier film is extremely important in the lithium ion battery, and is very weak parts, along with the raising of the energy content of battery, makes barrier film use thinner and thinner, thereby the potential safety hazard of some sensitive parts is improved greatly.
Summary of the invention
In order to solve existing deficiency in the prior art; the invention provides a kind of highly secure lithium ion battery of on barrier film, having diaphragm; take to compare on the sensitive part at lithium ion cell electrode group inner septum; be that the edge that is positioned at the ending of electrode coating initial sum on the barrier film sticks adhesive tape or spray glue polymerization or hot pressing acrylic PP glued membrane; improve the intensity of this position barrier film with this, thereby improve the fail safe of battery.
The technical scheme that a kind of highly secure lithium ion battery of having diaphragm on barrier film of the present invention is achieved is; comprise positive pole, negative pole, barrier film, electrolyte and battery container; the edge that is positioned at the ending of electrode coating initial sum at described barrier film is provided with adhesive tape or glued membrane; the described barrier film that has adhesive tape or glued membrane places between described positive pole and the negative pole; the above-mentioned positive pole that places, barrier film and negative pole coiling back are formed utmost point group; described utmost point group is arranged in the battery case; carry out fluid injection then, seal and chemical synthesis technology, thereby obtain lithium ion battery.
Another technical scheme that a kind of highly secure lithium ion battery of having diaphragm on barrier film of the present invention is achieved is; comprise positive pole, negative pole, barrier film, electrolyte and battery container; it is characterized in that; the edge that is positioned at the ending of electrode coating initial sum at described barrier film is provided with glued membrane; the described barrier film that has glued membrane places between described positive pole and the negative pole; the above-mentioned positive pole that places, barrier film and negative pole coiling back are formed utmost point group; described utmost point group is arranged in the battery case; carry out fluid injection then, seal and chemical synthesis technology, thereby obtain lithium ion battery.
Above-mentioned highly secure lithium ion battery, wherein, the glued membrane of described barrier film adopts spray glue polymerization glued membrane, and photopolymerization or thermal polymerization are adopted in the glue polymerization of described glued membrane, and the temperature of described thermal polymerization is less than or equal to 90 ℃; The thickness of adhesive tape or glued membrane is 10um to 30 μ m on the described barrier film.The glued membrane of described barrier film adopts hot pressing acrylic PP glued membrane.
Compared with prior art, the beneficial effect that the present invention had is: because the pressure and the state at inner each position of lithium ion cell electrode group are different, so the fail safe at each position height also is different.Because the pressure that battery capacity promotes makes barrier film use thinner and thinner, for the little or smoother position of pressure, safety is no problem.But for the big or more sharp-pointed position of pressure then fail safe lower greatly.The present invention is directed on the barrier film these relatively sensitive part further handle; promptly on barrier film, has diaphragm; such as: on barrier film, stick adhesive tape or spray glue polymerization or hot pressing acrylic PP glued membrane, be used for improving the intensity of this position barrier film, thus the fail safe that improves battery.
Description of drawings
Fig. 1 is a kind of front view of having the highly secure lithium ion battery structure of diaphragm on barrier film of the present invention;
Fig. 2 is the vertical view of lithium ion battery structure shown in Fig. 1.
Be the explanation of main position Reference numeral in the Figure of description below:
1-barrier film 2-adhesive tape 3-negative pole
The anodal 6-anode ear of 4-negative electrode lug 5-
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
As depicted in figs. 1 and 2; the present invention a kind of on barrier film the technical scheme with first specific embodiment of the highly secure lithium ion battery of diaphragm be; comprise anodal 5; negative pole 3; barrier film 1; electrolyte and battery container; the edge that is positioned at the ending of electrode coating initial sum at described barrier film 1 is provided with adhesive tape 2; the described barrier film 1 that has adhesive tape 2 place described anodal 5 and negative pole 3 between; with the above-mentioned positive pole that places 5; after reeling, barrier film 1 and negative pole 3 form utmost point group; the described utmost point is assembled in the battery case; negative electrode lug 4 and anode ear 6 are welded on the battery lid as negative pole and anodal collector; laser package welding then; carry out fluid injection; seal and chemical synthesis technology, thereby obtain lithium ion battery.The thickness of the adhesive tape on the described barrier film 1 is 10um to 30 μ m.
The present invention is a kind of to be on the basis of first specific embodiment in the technical scheme of having another specific embodiment of highly secure lithium ion battery of diaphragm on the barrier film, and the adhesive tape on the barrier film is replaced with glued membrane.Described glued membrane adopts spray glue polymerization glued membrane; In addition, the glued membrane of described barrier film can also adopt hot pressing acrylic PP glued membrane.Photopolymerization or thermal polymerization are adopted in the glue polymerization of described glued membrane, and the temperature of described thermal polymerization is less than or equal to 90 ℃; Described film thickness is 10um to 30 μ m.
In sum, the present invention is a kind of in the key point of having the highly secure lithium ion battery of diaphragm on the barrier film is: relatively have diaphragm on the sensitive part at battery diaphragm, be used for improving the intensity of this position barrier film, thereby improve the fail safe of battery.Promptly before utmost point group is reeled or in the utmost point group winding process, taped or spray glue polymerization or hot pressing acrylic PP glued membrane in need the tape position strengthened of barrier film 1, and adhesive tape 2 or glued membrane will have good tack with barrier film 1, and has a good pliability, be insoluble in the electrolyte, do not influence other performances of battery.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within the protection of the present invention.
Claims (5)
- One kind on barrier film with the highly secure lithium ion battery of diaphragm; comprise positive pole, negative pole, barrier film, electrolyte and battery container; it is characterized in that; the edge that is positioned at the ending of electrode coating initial sum at described barrier film is provided with adhesive tape; the described barrier film that has adhesive tape places between described positive pole and the negative pole; the above-mentioned positive pole that places, barrier film and negative pole coiling back are formed utmost point group; described utmost point group is arranged in the battery case; carry out fluid injection then, seal and chemical synthesis technology, thereby obtain lithium ion battery.
- 2. according to the described a kind of highly secure lithium ion battery of on barrier film, having diaphragm of claim 1, it is characterized in that the thickness of adhesive tape is 10um to 30 μ m on the described barrier film.
- One kind on barrier film with the highly secure lithium ion battery of diaphragm; comprise positive pole, negative pole, barrier film, electrolyte and battery container; it is characterized in that; the edge that is positioned at the ending of electrode coating initial sum at described barrier film is provided with glued membrane; the described barrier film that has glued membrane places between described positive pole and the negative pole; the above-mentioned positive pole that places, barrier film and negative pole coiling back are formed utmost point group; described utmost point group is arranged in the battery case; carry out fluid injection then, seal and chemical synthesis technology, thereby obtain lithium ion battery.
- 4. according to the described a kind of highly secure lithium ion battery of on barrier film, having diaphragm of claim 3, it is characterized in that, the glued membrane of described barrier film adopts spray glue polymerization glued membrane, and photopolymerization or thermal polymerization are adopted in the glue polymerization of described glued membrane, and the temperature of described thermal polymerization is less than or equal to 90 ℃; Described film thickness is 10um to 30 μ m.
- 5. according to the described a kind of highly secure lithium ion battery of on barrier film, having diaphragm of claim 3, it is characterized in that the glued membrane of described barrier film adopts hot pressing acrylic PP glued membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100569084A CN101017916A (en) | 2007-03-12 | 2007-03-12 | A highly secure lithium ion battery with the protection film in the separation film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100569084A CN101017916A (en) | 2007-03-12 | 2007-03-12 | A highly secure lithium ion battery with the protection film in the separation film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101017916A true CN101017916A (en) | 2007-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100569084A Pending CN101017916A (en) | 2007-03-12 | 2007-03-12 | A highly secure lithium ion battery with the protection film in the separation film |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201594A (en) * | 2010-03-25 | 2011-09-28 | 深圳市比克电池有限公司 | Square lithium ion battery and its manufacturing method |
| CN112490402A (en) * | 2019-09-12 | 2021-03-12 | 比亚迪股份有限公司 | Battery, battery module, battery pack and automobile |
| CN112582753A (en) * | 2019-09-12 | 2021-03-30 | 比亚迪股份有限公司 | Battery diaphragm, battery module, battery package and car |
| CN112615061A (en) * | 2021-01-12 | 2021-04-06 | 深圳市格林晟科技有限公司 | Preparation method and stacking device of battery cell |
| CN112750973A (en) * | 2020-12-31 | 2021-05-04 | 蜂巢能源科技有限公司 | Pole piece unit and preparation method thereof |
| CN112787038A (en) * | 2021-02-20 | 2021-05-11 | 天津谦同新能源科技有限公司 | Post-treatment method of lithium ion battery spinning diaphragm and spinning diaphragm |
| CN114447442A (en) * | 2022-02-07 | 2022-05-06 | 珠海冠宇电池股份有限公司 | Battery core and battery |
-
2007
- 2007-03-12 CN CNA2007100569084A patent/CN101017916A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201594A (en) * | 2010-03-25 | 2011-09-28 | 深圳市比克电池有限公司 | Square lithium ion battery and its manufacturing method |
| CN102201594B (en) * | 2010-03-25 | 2015-09-30 | 深圳市比克电池有限公司 | A kind of rectangular lithium ion battery and preparation method thereof |
| CN112490402A (en) * | 2019-09-12 | 2021-03-12 | 比亚迪股份有限公司 | Battery, battery module, battery pack and automobile |
| CN112582753A (en) * | 2019-09-12 | 2021-03-30 | 比亚迪股份有限公司 | Battery diaphragm, battery module, battery package and car |
| CN112750973A (en) * | 2020-12-31 | 2021-05-04 | 蜂巢能源科技有限公司 | Pole piece unit and preparation method thereof |
| CN112615061A (en) * | 2021-01-12 | 2021-04-06 | 深圳市格林晟科技有限公司 | Preparation method and stacking device of battery cell |
| CN112787038A (en) * | 2021-02-20 | 2021-05-11 | 天津谦同新能源科技有限公司 | Post-treatment method of lithium ion battery spinning diaphragm and spinning diaphragm |
| CN114447442A (en) * | 2022-02-07 | 2022-05-06 | 珠海冠宇电池股份有限公司 | Battery core and battery |
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