CN211595483U - Tab protection adhesive tape - Google Patents
Tab protection adhesive tape Download PDFInfo
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- CN211595483U CN211595483U CN201922496418.7U CN201922496418U CN211595483U CN 211595483 U CN211595483 U CN 211595483U CN 201922496418 U CN201922496418 U CN 201922496418U CN 211595483 U CN211595483 U CN 211595483U
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- tab
- transparent rubber
- rubber layer
- electrolyte
- adhesive tape
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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 utility model provides a tab protection adhesive tape, which comprises a transparent rubber layer and a colored insulating layer fixedly arranged on the back surface of the transparent rubber layer; the colored insulating layer completely covers the back of the transparent rubber layer; the transparent rubber layer is used for adhering and fully covering the welding area of the tab and the base material and the edge of the tab. The utility model provides a tab protection adhesive tape adopts transparent rubber layer to paste in the welding region of utmost point ear and substrate and utmost point ear edge, and oxygen content is low in the transparent rubber layer, does not almost contain polar functional group, is difficult for reacting with electrolyte, has good electrolyte resistance, avoids carbonization product to pollute electrolyte and consequently influences the electric core performance, improves the safety in utilization of electric core; meanwhile, the colored insulating layer can facilitate a color sensor on the sheet making machine to identify the tab protection adhesive tape, and can also prevent the color from being faded after being soaked in the electrolyte for a long time, so that the electrolyte is polluted and the performance of the battery cell is influenced.
Description
Technical Field
The utility model belongs to the technical field of lithium cell safety protection, more specifically say, relate to a utmost point ear protection sticky tape.
Background
The lithium ion battery has the advantages of high voltage, high specific energy, more recycling times, long storage time and the like, is widely applied to portable electronic equipment (such as mobile phones, digital cameras and portable computers), and is also widely applied to large and medium-sized electric equipment such as electric automobiles, electric bicycles, electric tools and the like, so that the safety requirement on the lithium ion battery is higher and higher.
In the manufacturing process of the soft package lithium ion battery, a tab and a base material form a molten welding spot at the ultrasonic welding position, and the welding spot and burrs on the edge of the tab easily puncture a diaphragm to form a short circuit; therefore, it is necessary to attach tab protection tapes to the welding area of the tab and the substrate and the edge of the tab for insulation protection. The tab protection tape generally needs to have good viscosity, no residual adhesive is left when the tape is uncovered, and the tab protection tape has the performances of high temperature resistance, electrolyte resistance, high electrical insulation and the like. The conventional tab protection adhesive tape comprises a blue acrylic adhesive layer and a transparent insulating layer fixedly arranged on the back of the acrylic adhesive layer, wherein the acrylic adhesive layer is adhered to a welding area of a tab and a base material and the edge of the tab; however, in the process of charging and discharging the battery, the acrylic adhesive layer of the tab protection adhesive tape is easily decomposed by reaction with the electrolyte, and the phenomena of carbonization, blackening, degumming, fading and the like occur, so that the performance of the battery core is affected.
Disclosure of Invention
An object of the utility model is to provide a utmost point ear protection sticky tape to solve the current utmost point ear protection sticky tape that exists among the prior art and easily decompose with electrolyte reaction, appear carbonizing blackening and the technical problem of the phenomenon of fading.
In order to achieve the above object, the utility model adopts the following technical scheme: the tab protection adhesive tape comprises a transparent rubber layer and a colored insulating layer fixedly arranged on the back of the transparent rubber layer; the colored insulating layer completely covers the back of the transparent rubber layer; the transparent rubber layer is used for adhering and fully covering the welding area of the tab and the base material and the edge of the tab.
Further, the transparent rubber layer is fixedly bonded with the colored insulating layer.
Further, the thickness of the transparent rubber layer is 6-10 μm.
Furthermore, the color insulating layer further comprises a release agent layer fixedly arranged on the back surface of the color insulating layer.
Further, the colored insulating layer is a PET film.
The utility model provides a beneficial effect of utmost point ear protection sticky tape lies in: compared with the prior art, the utility model discloses utmost point ear protection sticky tape adopts transparent rubber layer to paste in utmost point ear and substrate's welding region and utmost point ear edge, oxygen content is low in the transparent rubber layer, almost does not contain polar functional group, be difficult for reacting with electrolyte, has good electrolyte resistance, avoid carbonization product to pollute the electrolyte and thereby influence electric core performance, transparent rubber layer is also difficult to be corroded by the electrolyte and come unstuck, viscidity is good, ensure that utmost point ear protection sticky tape is firmly pasted in utmost point ear and substrate's welding region and utmost point ear edge and play the insulation protection effect, improve the safety in utilization of electric core; meanwhile, the colored insulating layer can facilitate a color sensor on the sheet making machine to identify the tab protection adhesive tape and can accurately shear and position the tab protection adhesive tape, so that the tab protection adhesive tape with a proper size is cut to cover the welding area of the tab and the base material and the edge of the tab, and the phenomenon that the color is faded after being soaked in the electrolyte for a long time to pollute the electrolyte and influence the performance of the battery cell can be avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural view of a tab protection tape provided by an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a transparent rubber layer; 2. a colored insulating layer; 3. and a release agent layer.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "thickness," "upper," "lower," "front," "back," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Referring to fig. 1, the tab protection tape of the present invention will now be described. The tab protection adhesive tape comprises a transparent rubber layer 1 and a colored insulating layer 2 fixedly arranged on the back of the transparent rubber layer 1, wherein the colored insulating layer 2 completely covers the back of the transparent rubber layer 1; the transparent rubber layer 1 is used for adhering and fully covering the welding area of the tab and the base material and the edge of the tab.
The utility model provides a tab protection adhesive tape, compared with the prior art, the utility model discloses tab protection adhesive tape adopts transparent rubber layer 1 to paste in the welding area and the tab edge of utmost point ear and substrate, and oxygen content is low in transparent rubber layer 1, does not contain polar functional group almost, is difficult for reacting with electrolyte, has good electrolyte resistance, avoids carbonization product to pollute electrolyte and consequently influences the electric core performance, and transparent rubber layer 1 is difficult to be corroded by electrolyte and comes unstuck yet, and viscidity is good, ensures that tab protection adhesive tape is firmly pasted in the welding area and the tab edge of utmost point ear and substrate and plays the insulation protection role, improves the safety in utilization of electric core; meanwhile, the colored insulating layer 2 can facilitate a color sensor on the sheet making machine to identify the tab protection adhesive tape and can accurately shear and position the tab protection adhesive tape, so that the tab protection adhesive tape with a proper size is cut to cover the welding area of the tab and the base material and the edge of the tab, and the phenomenon that the color is soaked in the electrolyte for a long time to cause color fading so as to pollute the electrolyte and influence the performance of the battery cell can be avoided.
Specifically, the transparent rubber layer 1 comprises 45 to 55% by weight of a styrene polymer, 36.8 to 43.8% by weight of a petroleum resin and 8.2 to 11.2% by weight of polyisobutylene; the components are simple and common, the cost performance is high, the purchase and the processing are convenient, and the production cost is low.
Preferably, the transparent rubber layer 1 includes 50% of styrene polymer, 40.3% of petroleum resin and 9.7% of polyisobutylene; the electrolyte resistance of the transparent rubber layer 1 is further enhanced, and the use safety of the battery cell is improved.
Specifically, the transparent rubber layer 1 is fixedly bonded with the colored insulating layer 2; the connection is simple and stable, the phenomenon that the transparent rubber layer 1 and the colored insulating layer 2 fall off and are separated to influence the insulation protection effect of the tab protection adhesive tape is avoided, and the processing and the manufacturing are convenient.
Preferably, the colored insulating layer 2 is a PET film, which has good insulation, creep resistance, fatigue resistance, and friction resistance, and is not easily deformed.
Specifically, the pure PET film is transparent, the PET films with different colors are formed by adding color pastes with different colors, and the blue PET film is generally selected, so that the color is obvious, and the distinguishing and the induction are convenient.
Specifically, the thickness of the transparent rubber layer 1 is 6 to 10 μm; the lug protection adhesive tape can be firmly adhered to the welding area of the lug and the base material and the edge of the lug, and other foreign matters can be prevented from being adhered to the side wall of the transparent rubber layer 1 in the lithium battery manufacturing process due to the fact that the transparent rubber layer 1 is too thick.
Further, referring to fig. 1, as a specific embodiment of the tab protection tape provided by the present invention, the tab protection tape further includes a release agent layer 3 fixedly disposed on the back surface of the colored insulating layer 2; the insulation protection effect of the tab protection adhesive tape is enhanced, and the short circuit formed by the fact that the tab protection adhesive tape is punctured by welding spots and burrs on the edge of the tab is avoided.
The preparation method of the tab protection adhesive tape of the utility model is as follows:
preparing glue: cutting the polyisobutylene rubber into small pieces, and dissolving the small pieces in a rubber solvent to obtain a polyisobutylene rubber solution; then adding petroleum resin and styrene polymer into the polyisobutylene rubber solution at room temperature, and fully stirring for 4 hours; drying at 80-100 ℃ after stirring to obtain transparent rubber;
pretreatment: coating a release agent on the back surface of the blue PET film to form a release agent layer 3;
coating: coating transparent rubber on the front surface of a blue PET film and drying at 80-100 ℃ to form a transparent rubber layer 1 to prepare a tab protection adhesive tape;
and finally rewinding the tab protection adhesive tape for slitting in the manufacturing process of the lithium ion battery to obtain a tab protection adhesive tape with a proper size, and sticking the tab protection adhesive tape on the welding area of the tab and the base material and the edge of the tab.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. Utmost point ear protection sticky tape, its characterized in that: comprises a transparent rubber layer and a colored insulating layer fixedly arranged on the back of the transparent rubber layer; the colored insulating layer completely covers the back of the transparent rubber layer; the transparent rubber layer is used for adhering and fully covering the welding area of the tab and the base material and the edge of the tab.
2. The tab protection tape according to claim 1, wherein: the transparent rubber layer is fixedly bonded with the colored insulating layer.
3. The tab protection tape according to claim 1, wherein: the thickness of the transparent rubber layer is 6-10 μm.
4. The tab protection tape according to claim 1, wherein: the insulating layer is fixedly arranged on the back surface of the colored insulating layer.
5. The tab protection tape according to claim 1, wherein: the colored insulating layer is a PET film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922496418.7U CN211595483U (en) | 2019-12-31 | 2019-12-31 | Tab protection adhesive tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922496418.7U CN211595483U (en) | 2019-12-31 | 2019-12-31 | Tab protection adhesive tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211595483U true CN211595483U (en) | 2020-09-29 |
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ID=72599653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922496418.7U Active CN211595483U (en) | 2019-12-31 | 2019-12-31 | Tab protection adhesive tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211595483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363642A (en) * | 2021-05-31 | 2021-09-07 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN114381210A (en) * | 2021-12-20 | 2022-04-22 | 天津力神电池股份有限公司 | Pole piece double-sided protection adhesive tape of lithium ion battery and lithium ion battery |
-
2019
- 2019-12-31 CN CN201922496418.7U patent/CN211595483U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363642A (en) * | 2021-05-31 | 2021-09-07 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN113363642B (en) * | 2021-05-31 | 2023-12-29 | 宁德新能源科技有限公司 | Battery core and electricity utilization device |
| CN114381210A (en) * | 2021-12-20 | 2022-04-22 | 天津力神电池股份有限公司 | Pole piece double-sided protection adhesive tape of lithium ion battery and lithium ion battery |
| CN114381210B (en) * | 2021-12-20 | 2024-04-30 | 天津力神电池股份有限公司 | Pole piece double-sided protection adhesive tape of lithium ion battery and lithium ion battery |
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