CN213150883U - Plastic-aluminum membrane, electric core and power battery - Google Patents
Plastic-aluminum membrane, electric core and power battery Download PDFInfo
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- CN213150883U CN213150883U CN202021772611.5U CN202021772611U CN213150883U CN 213150883 U CN213150883 U CN 213150883U CN 202021772611 U CN202021772611 U CN 202021772611U CN 213150883 U CN213150883 U CN 213150883U
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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 relates to the technical field of batteries, and provides an aluminum plastic film, an electric core and a power battery, wherein the aluminum plastic film is used for wrapping the electric core, the aluminum plastic film comprises a film body, the outer surface of the film body is divided into a first area adjacent to the anode side of the electric core, a second area adjacent to the cathode side of the electric core and a third area between the first area and the second area, the film body is covered with temperature-sensing color-changing coatings in the first area, the second area and the third area, when the electric core adopting the aluminum plastic film is subjected to charging and discharging tests, a tester can visually judge the temperature conditions of different parts of the electric core according to the color change condition of each temperature-sensing color-changing coating, thereby accurately reflecting the whole working temperature of the electric core, effectively improving the accuracy of the charging and discharging tests of the electric core, and when the charging and discharging tests are carried out on the electric core in large batch, the tester can more rapidly screen out the electric core with abnormal working temperature, the efficiency of the battery cell charge and discharge test is effectively improved.
Description
Technical Field
The utility model relates to the technical field of batteries, especially, provide an aluminum-plastic film, electric core and power battery.
Background
With the rapid development of new energy industry, electric vehicles are more and more favored by consumers, and the power battery is used as a core component of the electric vehicle, so that the popularization and application of the electric vehicle are directly influenced by the good and bad working performance of the power battery.
The power battery is generally formed by connecting a plurality of battery cores in series and parallel, in order to guarantee the working performance of the power battery, the charging and discharging test needs to be carried out on each battery core, and the battery core is usually required to be measured by means of the surface temperature of the battery core when the charging and discharging test is carried out, however, the temperature measurement is generally carried out only on a certain part of the battery core in the temperature measurement process, the whole working temperature of the battery core cannot be accurately reflected, the temperature measurement can be carried out only one by one on the battery core, and the test efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an aluminium-plastic film, electric core and power battery aims at solving current electric core charge-discharge test accuracy and the lower technical problem of efficiency.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides an aluminum-plastic membrane for cladding electricity core, aluminum-plastic membrane includes the membrane body, and the surface of membrane body is divided into the first region adjacent with the positive pole side of electricity core, and the second region adjacent with the negative pole side of electricity core to and be located the third region between first region and the second region, and the membrane body all covers in first region, in the second region and the third region has the temperature sensing coating that discolours.
The embodiment of the utility model provides an aluminum plastic film has following beneficial effect at least: because the positive side, the negative side and the position between the positive side and the negative side of the battery cell are main heating positions when the charging and discharging test is carried out, the first area, the second area and the third area of the film body of the aluminum plastic film respectively correspond to the positive side, the negative side and the position between the positive side and the negative side of the battery cell, the temperature sensing color changing coatings in the first area, the second area and the third area of the film body can change colors according to the temperature change of each part of the battery cell, a tester can visually judge the temperature conditions of different parts of the battery cell according to the color change condition of each temperature sensing color changing coating, thereby accurately reflecting the whole working temperature of the battery cell, effectively improving the accuracy of the charging and discharging test of the battery cell, and when the charging and discharging test is carried out on the battery cell in large batch, the tester can visually judge the temperature condition of each battery cell according to the color change condition of each temperature sensing color changing coating, therefore, the abnormal cell at the working temperature can be screened out more rapidly, and the efficiency of the cell charge and discharge test is effectively improved.
In one embodiment, the thickness of each thermochromic coating is 5 μm to 30 μm.
In one embodiment, the aluminum-plastic film further comprises a sealing transparent layer sheet, and the sealing transparent layer sheet covers each temperature-sensitive color-changing coating.
Through adopting above-mentioned technical scheme, can be when not influencing the condition of discolouing that the tester observed the temperature sensing coating that discolours, effectively seal the temperature sensing coating that discolous, prevent effectively that the temperature sensing from discolouing the coating because of leading to the oxidation inefficacy with the oxygen contact.
In one embodiment, the thickness of the sealed transparent layer sheet is 3 μm to 30 μm.
By adopting the technical scheme, the thickness of the sealed transparent layer sheet can be limited in a reasonable interval, and the sealing protection effect of the sealed transparent layer sheet on the temperature-sensitive color-changing coating is effectively ensured.
In one embodiment, the film body comprises an insulating layer sheet, a metal layer sheet and a protective layer sheet, wherein the insulating layer sheet, the metal layer sheet and the protective layer sheet are sequentially stacked, and each temperature-sensitive color-changing coating covers the surface of the protective layer sheet, which is far away from the metal layer sheet.
By adopting the technical scheme, the insulating layer sheet plays an effective isolation role between the metal layer sheet and the electrolyte in the battery cell, and the insulating property of the battery cell is ensured; the metal layer sheet plays an effective supporting role for the whole battery cell; the protective layer sheet plays an effective protective role for the metal layer sheet, and the situation that the metal layer sheet is scratched is avoided.
In one embodiment, the thickness of the insulating layer sheet is 10 μm to 70 μm.
By adopting the technical scheme, the thickness of the insulating layer sheet can be limited in a reasonable interval, and the insulating effect of the insulating layer sheet on the metal layer sheet and the electrolyte in the battery cell is effectively ensured.
In one embodiment, the thickness of the metal layer is 50 μm to 100 μm.
Through adopting above-mentioned technical scheme, can prescribe a limit to reasonable interval with the thickness of metal lamina, can avoid leading to the metal lamina to appear damaged in the manufacturing process because of the metal lamina is too thin, also can avoid leading to electric core quality too big because of the metal lamina is too thick, and then lead to the energy density decline of electric core.
In one embodiment, the thickness of the protective layer sheet is 15 μm to 50 μm.
By adopting the technical scheme, the thickness of the protective layer sheet can be limited in a reasonable interval, and the protective effect of the protective layer sheet on the metal layer sheet is effectively ensured.
In order to achieve the above object, the utility model also provides an electricity core, including above-mentioned plastic-aluminum membrane.
Since the battery core adopts all the embodiments of the aluminum-plastic film, at least all the beneficial effects of the embodiments are achieved, and no further description is given here.
In order to achieve the above object, the present invention also provides a power battery, which includes a plurality of the above electrical cores.
Since the power battery adopts all the embodiments of the battery core, at least all the beneficial effects of the embodiments are achieved, and no further description is given here.
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 diagram of a battery cell provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an aluminum plastic film in the battery cell shown in fig. 1;
fig. 3 is a front view of the aluminum plastic film shown in fig. 2.
Wherein, in the figures, the respective reference numerals:
10. the battery comprises a battery cell, 11, an aluminum plastic film, 111, a film body, 1111, a first area, 1112, a second area, 1113, a third area, 1114, an insulating layer sheet, 1115, a metal layer sheet, 1116, a protective layer sheet, 112, a thermochromic coating, 113, a sealing transparent layer sheet, 12, a positive electrode tab, 13 and a negative electrode tab.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, an electrical core 10 includes a positive tab 12, a negative tab 13, and an aluminum-plastic film 11, where the aluminum-plastic film 11 is coated outside an electrical core body to form a casing of the electrical core 10, the positive tab 12 and the negative tab 13 are respectively disposed at two ends of the casing, or the positive tab 12 and the negative tab 13 are disposed at the same end side of the casing.
The above aluminum plastic film 11 will be described in detail with reference to the drawings.
Referring to fig. 1 to 3, an aluminum plastic film 11 is used for covering an electrical core 10, the aluminum plastic film 11 includes a film body 111, an outer surface of the film body 111 is divided into a first region 1111 adjacent to a positive electrode tab 12 of the electrical core 10, a second region 1112 adjacent to a negative electrode tab 13 of the electrical core 10, and a third region 1113 located between the first region 1111 and the second region 1112, and the film body 111 is covered with a temperature-sensitive color-changing coating 112 in the first region 1111, the second region 1112, and the third region 1113.
When performing the charge and discharge test, the position near the positive electrode tab 12, the position near the negative electrode tab 13, and the position between the positive electrode tab 12 and the negative electrode tab 13 of the battery cell 10 are all main heat generating positions, and the first region 1111, the second region 1112, and the third region 1113 of the film body 111 of the aluminum-plastic film 11 respectively correspond to the position near the positive electrode tab 12, the position near the negative electrode tab 13, and the position between the positive electrode tab 12 and the negative electrode tab 13 of the battery cell 10, and the temperature-sensitive color-changing coatings 112 in the first region 1111, the second region 1112, and the third region 1113 of the film body 111 change color according to the temperature change of each part of the battery cell 10, so that the tester can intuitively judge the temperature conditions of different parts of the battery cell 10 according to the color change condition of each temperature-sensitive color-changing coating 112, thereby being capable of accurately reflecting the overall working temperature of the battery cell 10, and effectively improving the accuracy of the charge and, when a large number of battery cells 10 are subjected to charge and discharge tests, a tester can visually judge the temperature condition of each battery cell 10 according to the color change condition of each thermochromic coating 112, so that the battery cells 10 with abnormal working temperature can be screened out more quickly, and the efficiency of the charge and discharge tests of the battery cells 10 is effectively improved.
Specifically, in general, during the charge and discharge test, the temperature near the positive electrode tab 12 of the battery cell 10 is higher than the temperature near the negative electrode tab 13In order to facilitate the tester to judge the temperature condition of the battery cell 10 according to the color change condition of each thermochromic coating 112, the thermochromic coating 112 in the first region 1111, the thermochromic coating 112 in the second region 1112, and the thermochromic coating 112 in the third region 1113 respectively adopt different paints, for example, the thermochromic coating 112 in the first region 1111 adopts CoSO4·2C6H12N4·9H2O, when the temperature is below 60 ℃, the color of the thermochromic coating 112 in the first region 1111 is peach-red, and when the temperature is above 60 ℃, the color of the thermochromic coating 112 in the first region 1111 is purple; the thermochromic coating 112 in the second region 1112 is CoI2·2C6H12N4·10H2O, the color of the thermochromic coating 112 in the second region 1112 is pink when the temperature is 50 ℃ or lower, and the color of the thermochromic coating 112 in the second region 1112 is green when the temperature is 50 ℃ or higher; the thermochromic coating 112 in the third region 1113 is made of crystal violet lactone of microcapsule particles, the coating is prepared by complex coacervation of crystal violet lactone, tannic acid, lauric acid, gelatin, acacia solution, acetic acid and formalin, the color of the thermochromic coating 112 in the third region 1113 is blue when the temperature is below 40 ℃, and the color of the thermochromic coating 112 in the third region 1113 is colorless when the temperature is above 40 ℃.
Of course, the thermochromic coating 112 in the first region 1111, the thermochromic coating 112 in the second region 1112, and the thermochromic coating 112 in the third region 1113 may be the same coating, such as CoSO4·2C6H12N4·9H2O、CoI2·2C6H12N4·10H2O, crystal violet lactone of microcapsule particles, and the like, and are not particularly limited herein.
In the present embodiment, the thickness of each thermochromic coating 112 is 5 μm to 30 μm, such as 5 μm, 10 μm, 30 μm, and the like, and specific values are not limited herein.
In this embodiment, please refer to fig. 1 to 3, the aluminum plastic film 11 further includes a sealing transparent layer sheet 113, and the sealing transparent layer sheet 113 covers each thermochromic coating 112. By covering the transparent sealing layer sheet 113 on the thermochromic coating 112, the thermochromic coating 112 can be effectively sealed while the color change condition of the thermochromic coating 112 is not influenced for a tester to observe, so that the thermochromic coating 112 is effectively prevented from being oxidized and losing efficacy due to contact with oxygen.
The kind of the transparent sealing sheet 113 includes various kinds, such as a polyester sheet, a polyamide sheet, a cast polypropylene sheet, and the like, and is not limited herein.
Specifically, the thickness of the sealing transparent layer sheet 113 is 3 μm to 30 μm, such as 3 μm, 15 μm, 30 μm, or the like. By adopting the technical scheme, the thickness of the sealed transparent layer sheet 113 can be limited in a reasonable interval, and the sealing protection effect of the sealed transparent layer sheet 113 on the thermochromic coating 112 is effectively ensured.
In this embodiment, as shown in fig. 2 and fig. 3, the film body 111 includes an insulating layer 1114, a metal layer 1115, and a protective layer 1116, the insulating layer 1114, the metal layer 1115, and the protective layer 1116 are sequentially stacked, and each thermochromic coating 112 covers a surface of the protective layer 1116 away from the metal layer 1115. The film body 111 is formed by sequentially laminating an insulating layer sheet 1114, a metal layer sheet 1115 and a protective layer sheet 1116, wherein the insulating layer sheet 1114 plays an effective isolation role between the metal layer sheet 1115 and an electrolyte in the battery cell 10, and ensures the insulating property of the battery cell 10; the metal layer sheet 1115 plays an effective supporting role for the whole battery cell 10; the protective layer 1116 serves to effectively protect the metal layer 1115 from scratching the metal layer 1115.
The kind of the insulating layer sheet 1114 includes various kinds, such as a cast polypropylene layer sheet, a polyethylene layer sheet, a polypropylene layer sheet, and the like, and is not limited herein; the types of the metal layer sheet 1115 include various types, such as an aluminum foil layer sheet, a copper foil layer sheet, and the like, and are not limited herein; the kind of the protective layer 1116 includes various kinds, such as a polyamide layer, a polyester layer, and the like, and is not limited herein.
Specifically, the thickness of the insulating layer 1114 is 10 μm to 70 μm, such as 10 μm, 30 μm, 70 μm, and the like. By adopting the technical scheme, the thickness of the insulating layer sheet 1114 can be limited in a reasonable interval, and the insulating effect of the insulating layer sheet 1114 on the metal layer sheet 1115 and the electrolyte in the battery cell 10 is effectively ensured.
Specifically, the thickness of the metal layer sheet 1115 is 50 μm to 100 μm, such as 50 μm, 75 μm, 100 μm, and the like. By adopting the technical scheme, the thickness of the metal layer sheet 1115 can be limited in a reasonable interval, so that the damage of the metal layer sheet 1115 caused by the excessively thin metal layer sheet 1115 in the manufacturing process can be avoided, and the reduction of the energy density of the battery cell 10 caused by the excessively large quality of the battery cell 10 caused by the excessively thick metal layer sheet 1115 can also be avoided.
Specifically, the thickness of the protective layer 1116 is 15 μm to 50 μm, such as 15 μm, 30 μm, 50 μm, or the like. By adopting the technical scheme, the thickness of the protective layer piece 1116 can be limited in a reasonable interval, and the protective effect of the protective layer piece 1116 on the metal layer piece 1115 is effectively ensured.
A power battery comprises a plurality of battery cores 10.
Since the power battery adopts all the embodiments of the battery core 10, at least all the beneficial effects of the embodiments are achieved, and no further description is given here.
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 (10)
1. The utility model provides an aluminum-plastic film for wrap up electric core, aluminum-plastic film includes the membrane body, its characterized in that: the outer surface of the membrane body is divided into a first area adjacent to the positive electrode side of the battery cell, a second area adjacent to the negative electrode side of the battery cell and a third area located between the first area and the second area, and the membrane body is covered with temperature-sensitive color-changing coatings in the first area, the second area and the third area.
2. The aluminum-plastic composite film of claim 1, wherein: the thickness of each temperature-sensitive color-changing coating is 5-30 μm.
3. The aluminum-plastic composite film of claim 1, wherein: the aluminum-plastic film also comprises a sealing transparent layer sheet which covers each temperature-sensitive color-changing coating.
4. The aluminum-plastic composite film of claim 3, wherein: the thickness of the sealing transparent layer sheet is 3-30 μm.
5. The aluminum-plastic composite film of any one of claims 1 to 4, wherein: the film body comprises an insulating layer sheet, a metal layer sheet and a protective layer sheet, wherein the insulating layer sheet, the metal layer sheet and the protective layer sheet are sequentially stacked, and each thermochromic coating covers the surface of the protective layer sheet, which faces away from the metal layer sheet.
6. The aluminum-plastic composite film of claim 5, wherein: the thickness of the insulating layer sheet is 10-70 μm.
7. The aluminum-plastic composite film of claim 5, wherein: the thickness of the metal layer sheet is 50-100 mu m.
8. The aluminum-plastic composite film of claim 5, wherein: the thickness of the protective layer sheet is 15-50 μm.
9. An electric core, its characterized in that: comprising an aluminium-plastic film according to any one of claims 1 to 8.
10. A power battery, characterized by: comprising a plurality of cells of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021772611.5U CN213150883U (en) | 2020-08-21 | 2020-08-21 | Plastic-aluminum membrane, electric core and power battery |
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| CN202021772611.5U CN213150883U (en) | 2020-08-21 | 2020-08-21 | Plastic-aluminum membrane, electric core and power battery |
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| CN213150883U true CN213150883U (en) | 2021-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324198A (en) * | 2021-12-16 | 2022-04-12 | 重庆冠宇电池有限公司 | Battery cell dispensing quality detection method |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324198A (en) * | 2021-12-16 | 2022-04-12 | 重庆冠宇电池有限公司 | Battery cell dispensing quality detection method |
| CN114324198B (en) * | 2021-12-16 | 2023-11-14 | 重庆冠宇电池有限公司 | Battery cell dispensing quality detection method |
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